Fixes to composer.json file
BUG FIXES
- Specify the extension key in composer.json.
- Remove unnecessary version property from composer.json.
- Remove pointless replace from composer.json.
- Added .gitignore file
THANKS
- Thanks to @mbrodala and @josefglatz for tidying up the composer.json file.
- Thanks to @dmh for fixing a parsing error and adding the .gitignore file.