v1.2.0

• docs(versions): adding since tags to all function docs 7112d9f
• feat(only-unique-values): add new functionality with unit tests f7d765c
• feat(size-of-object): added new functionality with unit tests 2cd9a9d
• feat(merge-objects): adding functionality for merge with unit tests ae9c37a
• feat(sort-array-by-key): added new function with unit tests 49a7beb
• feat(is-key-in-object): checks if a key exists inside of an object febe608
• feat(is-object-empty): validates that an object is empty ba505da
• feat(capitalise): adding function to capitalise first letter of string 8a00b46
• refactor(since): removed since tag from function definitions 4848ff9
• feat(is-email): adding function to validate an email 10f4fe5

v1.1.0...v1.2.0