refactor: update build process to enable tree shaking (#568)

BREAKING CHANGE: 

Validation functions was removed from `Validator` class to enable tree shaking.

BEFORE:

    import {Validator} from "class-validator";

    const validator = new Validator();
    validator.isNotIn(value, possibleValues);
    validator.isBoolean(value);

AFTER:

    import {isNotIn, isBoolean} from "class-validator";

    isNotIn(value, possibleValues);
    isBoolean(value);

Closes #258, #248, #247, #212

Author: vlapo

.gitignore

@@ -1,6 +1,48 @@
-build/
-node_modules/
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Yarn Integrity file
+.yarn-integrity
+
+# Output of 'npm pack'
+*.tgz
+
+# Optional npm cache directory
+.npm
+
+# TypeScript v1 declaration files
+typings/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Coverage report dir
 coverage/
-npm-debug.log
+
+# Dependency directories
+node_modules/
+
+# rollup.js build output
+dist/
+build/
+
+
+# IDEs
 *.iml
-.idea/
+.idea/
+.vscode/
+

README.md

@@ -790,105 +790,10 @@ If you want to perform a simple non async validation you can use `validateSync`
 There are several method exist in the Validator that allows to perform non-decorator based validation:
 
 ```typescript
-import {Validator} from "class-validator";
-
-// Validation methods
-const validator = new Validator();
-
-// common validation methods
-validator.isDefined(value); // Checks if value is defined ("!==undefined").
-validator.equals(value, comparison); // Checks if value matches ("===") the comparison.
-validator.notEquals(value, comparison); // Checks if value does not match ("!==") the comparison.
-validator.isEmpty(value); // Checks if given value is empty (=== '', === null, === undefined).
-validator.isNotEmpty(value); // Checks if given value is not empty (!== '', !== null, !== undefined).
-validator.isIn(value, possibleValues); // Checks if given value is in a array of allowed values.
-validator.isNotIn(value, possibleValues); // Checks if given value not in a array of allowed values.
-
-// type validation methods
-validator.isBoolean(value); // Checks if a given value is a real boolean.
-validator.isDate(value); // Checks if a given value is a real date.
-validator.isString(value); // Checks if a given value is a real string.
-validator.isArray(value); // Checks if a given value is an array.
-validator.isNumber(value, options); // Checks if a given value is a real number.
-validator.isInt(value); // Checks if value is an integer.
-validator.isEnum(value, entity); // Checks if value is valid for a certain enum entity.
-
-// number validation methods
-validator.isDivisibleBy(value, num); // Checks if value is a number that's divisible by another.
-validator.isPositive(value); // Checks if the value is a positive number.
-validator.isNegative(value); // Checks if the value is a negative number.
-validator.min(num, min); // Checks if the first number is greater than or equal to the second.
-validator.max(num, max); // Checks if the first number is less than or equal to the second.
-
-// date validation methods
-validator.minDate(date, minDate); // Checks if the value is a date that's after the specified date.
-validator.maxDate(date, maxDate); // Checks if the value is a date that's before the specified date.
-
-// string-type validation methods
-validator.isBooleanString(str); // Checks if a string is a boolean.
-validator.isNumberString(str); // Checks if the string is numeric.
-
-// string validation methods
-validator.contains(str, seed); // Checks if the string contains the seed.
-validator.notContains(str, seed); // Checks if the string does not contain the seed.
-validator.isAlpha(str); // Checks if the string contains only letters (a-zA-Z).
-validator.isAlphanumeric(str); // Checks if the string contains only letters and numbers.
-validator.isDecimal(str, options); // Checks if the string is a valid decimal value.
-validator.isAscii(str); // Checks if the string contains ASCII chars only.
-validator.isBase64(str); // Checks if a string is base64 encoded.
-validator.isByteLength(str, min, max); // Checks if the string's length (in bytes) falls in a range.
-validator.isCreditCard(str); // Checks if the string is a credit card.
-validator.isCurrency(str, options); // Checks if the string is a valid currency amount.
-validator.isEmail(str, options); // Checks if the string is an email.
-validator.isFQDN(str, options); // Checks if the string is a fully qualified domain name (e.g. domain.com).
-validator.isFullWidth(str); // Checks if the string contains any full-width chars.
-validator.isHalfWidth(str); // Checks if the string contains any half-width chars.
-validator.isVariableWidth(str); // Checks if the string contains variable-width chars.
-validator.isHexColor(str); // Checks if the string is a hexadecimal color.
-validator.isHexadecimal(str); // Checks if the string is a hexadecimal number.
-validator.isMACAddress(str); // Checks if the string is a MAC Address.
-validator.isIP(str, version); // Checks if the string is an IP (version 4 or 6).
-validator.isPort(str); // Check if the string is a valid port number.
-validator.isISBN(str, version); // Checks if the string is an ISBN (version 10 or 13).
-validator.isISIN(str); // Checks if the string is an ISIN (stock/security identifier).
-validator.isISO8601(str, options); // Checks if the string is a valid ISO 8601 date. Use the option strict = true for additional checks for a valid date, e.g. invalidates dates like 2019-02-29.
-validator.isJSON(str); // Checks if the string is valid JSON (note: uses JSON.parse).
-validator.isJWT(str) // Checks if the string is valid JWT.
-validator.isObject(object); // Checks if the object is valid Object (null, functions, arrays will return false)
-validator.isNotEmptyObject(object); // Checks if the object is not empty
-validator.isLowercase(str); // Checks if the string is lowercase.
-validator.isLatLong(str); // Checks if the string is a valid latitude-longitude coordinate in the format lat,long
-validator.isLatitude(str); // Checks if the string or number is a valid latitude coordinate
-validator.isLongtitude(str); // Checks if the string or number is a valid longitude coordinate
-validator.isMobilePhone(str, locale); // Checks if the string is a mobile phone number.
-validator.isISO31661Alpha2(str); // Check if the string is a valid ISO 3166-1 alpha-2
-validator.isISO31661Alpha3(str); // Check if the string is a valid ISO 3166-1 alpha-3
-validator.isPhoneNumber(str, region); // Checks if the string is a valid phone number.
-validator.isMongoId(str); // Checks if the string is a valid hex-encoded representation of a MongoDB ObjectId.
-validator.isMultibyte(str); // Checks if the string contains one or more multibyte chars.
-validator.isSurrogatePair(str); // Checks if the string contains any surrogate pairs chars.
-validator.isURL(str, options); // Checks if the string is an url.
-validator.isUUID(str, version); // Checks if the string is a UUID (version 3, 4, 5 or all).
-validator.IsFirebasePushId(str); // Checks if the string is a Firebase Push Id
-validator.isUppercase(str); // Checks if the string is uppercase.
-validator.length(str, min, max); // Checks if the string's length falls in a range.
-validator.minLength(str, min); // Checks if the string's length is not less than given number.
-validator.maxLength(str, max); // Checks if the string's length is not more than given number.
-validator.matches(str, pattern, modifiers); // Checks if string matches the pattern. Either matches('foo', /foo/i) or matches('foo', 'foo', 'i').
-validator.isMilitaryTime(str); // Checks if the string is a valid representation of military time in the format HH:MM.
-validator.isHash(str, algorithm); // Checks if the string is a hash of type algorithm.
-validator.isISSN(str, options); // Checks if the string is a ISSN.
-
-// array validation methods
-validator.arrayContains(array, values); // Checks if array contains all values from the given array of values.
-validator.arrayNotContains(array, values); // Checks if array does not contain any of the given values.
-validator.arrayNotEmpty(array); // Checks if given array is not empty.
-validator.arrayMinSize(array, min); // Checks if array's length is at least `min` number.
-validator.arrayMaxSize(array, max); // Checks if array's length is as most `max` number.
-validator.arrayUnique(array); // Checks if all array's values are unique. Comparison for objects is reference-based.
-
-// object validation methods
-validator.isInstance(value, target); // Checks value is an instance of the target.
+import {isEmpty, isBoolean} from "class-validator";
+
+isEmpty(value);
+isBoolean(value);
 ```
 
 ## Validation decorators
@@ -943,7 +848,7 @@ validator.isInstance(value, target); // Checks value is an instance of the targe
 | `@IsVariableWidth()`                            | Checks if the string contains a mixture of full and half-width chars.                                                            |
 | `@IsHexColor()`                                 | Checks if the string is a hexadecimal color.                                                                                     |
 | `@IsHexadecimal()`                              | Checks if the string is a hexadecimal number.                                                                                    |
-| `@IsMACAddress()`                               | Checks if the string is a MAC Address.                                                                                            |
+| `@IsMACAddress(options?: IsMACAddressOptions)`  | Checks if the string is a MAC Address.                                                                                            |
 | `@IsIP(version?: "4"\|"6")`                     | Checks if the string is an IP (version 4 or 6).                                                                                  |
 | `@IsPort()`                                     | Check if the string is a valid port number.                                                                                      |
 | `@IsISBN(version?: "10"\|"13")`                 | Checks if the string is an ISBN (version 10 or 13).                                                                              |