Migrate to esbuild #93

Job	Run time
build	1m 19s
lint	1m 46s
integration-tests (18, ubuntu, chromium)	6h 0m 13s
integration-tests (18, ubuntu, firefox)	6h 0m 4s
integration-tests (18, windows, chromium)	5h 59m 44s
integration-tests (18, windows, firefox)	5h 57m 33s
unit-tests (16, ubuntu)	1s
unit-tests (16, macos)	2m 30s
unit-tests (16, windows)	1s
unit-tests (18, ubuntu)	1s
unit-tests (18, macos)	1s
unit-tests (18, windows)	1s
	1d 0h 3m 14s

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