Bump decorator-transforms to v2 #800

Job	Run time
Lint JS	18s
Lint JS	18s
Tests: Type Check	12s
Tests: Type Check	12s
Tests (addon-location)	56s
Tests (addon-location)	56s
Slow tests: defaults with npm	2m 15s
Slow tests: defaults with npm	2m 15s
Tests (test-app-location)	47s
Tests (test-app-location)	47s
Slow tests: defaults with yarn	1m 25s
Slow tests: defaults with yarn	1m 25s
Tests (addon-only)	24s
Tests (addon-only)	24s
Slow tests: typescript with npm	2m 10s
Slow tests: typescript with npm	2m 10s
Slow tests: defaults with pnpm	59s
Slow tests: defaults with pnpm	59s
Tests (monorepo with npm)	1m 45s
Tests (monorepo with npm)	1m 45s
Slow tests: typescript with yarn	1m 42s
Slow tests: typescript with yarn	1m 42s
Tests (monorepo with yarn)	1m 10s
Tests (monorepo with yarn)	1m 10s
Slow tests: typescript with pnpm	5m 21s
Slow tests: typescript with pnpm	1m 16s
Tests (monorepo with pnpm)	45s
Tests (monorepo with pnpm)	45s
Tests (rollup-build)	1m 2s
Tests (rollup-build)	1m 2s
Tests (declarations-configuration)	39s
Tests (declarations-configuration)	39s
	39m 35s

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