New Assert class methods snippets (#4)

* Update apex-snippets.json (#3)

replaced System.assert with Assert methods
added snippet for debug with JSON.serializePretty

* Added message param for assert snippets

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Co-authored-by: Ravindra Singh <[email protected]>
Co-authored-by: Ajinkya Hingne <[email protected]>

Fixed test method snippets

Updated version number

"Updated manifest and changelog for patch release 1.1.1

Added a new snippet and updated documentation

- Added HTTP request snippet for Apex
- Updated readme and documentation

Initial commit with first version