v2.2.0

• fix limit() method if string length is lower or equals to provided limit.
• fix studly() method.
• fix issue with encoding on new Strings object creation.
• remove memory cache for words.
• add tests for isSimilar() method.
• improve tests for isBase64() method.
• improve tests for move() method.
• improve tests for beforeLast() method.
• improve tests for afterLast() method.
• improve tests for replaceFirst() method.
• improve tests for between() method.
• improve tests for indexOfLast() method.
• improve tests for indexOf() method.
• improve tests for random() method.
• improve tests for replaceLast() method.
• improve tests for isSerialized() method.
• improve tests for hash() method.
• improve tests for studly() method.
• improve tests for __costruct() method.
• improve tests workflow.