feat(stdlib): Add `List.filterMap`, `List.filterMapi`, `List.findMap`… #877

Job	Run time
Create Release	23s
Build release binaries	0s
Dispatch Docker builds	0s
Upload release npm artifacts	0s
Build preview binaries / (js) Build and test	14m 11s
Upload release binaries	0s
Publish stdlib to npm registry	0s
Dispatch website release	0s
Dispatch homebrew release	0s
Generate documentation / Generate documentation	45s
Upload preview binaries / Upload binaries to preview	23s
	15m 42s

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