optional build cache #262

Job	Run time
Lint	52s
Generate the SWIG wrappers / Generate the SWIG wrappers	1m 9s
Build ASAN instrumented version / Build ASAN on ubuntu-latest	4m 37s
Build code coverage instrumented version / Build codecov on ubuntu-latest	6m 33s
Build native / Build native on ubuntu-latest w/o libtiff	5m 5s
Build native / Build native on macos-latest w/o libtiff	4m 6s
Build native / Build native on macos-latest	4m 24s
Build native / Build native on ubuntu-latest	5m 2s
Build native / Build native on windows-latest w/o libtiff	9m 29s
Build native / Build native on windows-latest	11m 24s
Build WASM / Build wasm on ubuntu-latest w/o libtiff w/o proj.db	8m 40s
Build WASM / Build wasm on ubuntu-latest w/o proj.db	9m 26s
Build WASM / Build wasm on ubuntu-latest w/o libtiff	8m 17s
Build WASM / Build wasm on ubuntu-latest	9m 50s
Run code coverage	1m 0s
Run asan	1m 3s
Test ubuntu-latest	1m 8s
Test ubuntu-latest w/o libtiff	1m 8s
Test ubuntu-latest w/o proj.db	1m 8s
Test ubuntu-latest w/o libtiff w/o proj.db	1m 8s
Test macos-latest	53s
Test macos-latest w/o libtiff	52s
Test macos-latest w/o proj.db	55s
Test macos-latest w/o libtiff w/o proj.db	54s
Test windows-latest	4m 20s
Test windows-latest w/o libtiff	4m 21s
Test windows-latest w/o proj.db	5m 28s
Test windows-latest w/o libtiff w/o proj.db	4m 12s
	1h 57m 24s

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