Add tests, fix readme issues

[kurkle]

• Update readme versions and fix linting issues
• Rename onzoomRejected to onZoomRejected (missed this one in Added optional modifier keys #382)
• Add the tests from Added optional modifier keys #382
• Add a fixture test about category scale zoom behavior
• Remove deprecatedOptions handling
• Add a fixture for resetZoom
• Add simulated pan fixture

[kurkle]

Filename	Size	Change
dist/chartjs-plugin-zoom.esm.js	5.41 kB	-69 B (-1%)
dist/chartjs-plugin-zoom.js	5.67 kB	-59 B (-1%)
dist/chartjs-plugin-zoom.min.js	3.27 kB	-33 B (-1%)