Add github-binarycache option to use built in cache #76

Job	Run time
test-manifest (ubuntu-20.04, x64-linux-release, false)	44s
test-manifest (macos-11, x64-osx-release, false)	50s
test-vcpkg-action-latest-vcpkg-release (ubuntu-20.04, x64-linux-release, false)	42s
test-vcpkg-action (ubuntu-20.04, x64-linux-release, false)	51s
test-manifest (windows-2019, x64-windows-release, false)	19s
test-vcpkg-action-latest-vcpkg-release (macos-11, x64-osx-release, false)	44s
test-vcpkg-action (macos-11, x64-osx-release, false)	43s
test-manifest (ubuntu-20.04, x64-linux-release, true)	20s
test-vcpkg-action-latest-vcpkg-release (windows-2019, x64-windows-release, false)	20s
test-manifest (macos-11, x64-osx-release, true)	1m 7s
test-vcpkg-action (windows-2019, x64-windows-release, false)	19s
test-vcpkg-action-latest-vcpkg-release (ubuntu-20.04, x64-linux-release, true)	49s
test-vcpkg-action (ubuntu-20.04, x64-linux-release, true)	27s
test-manifest (windows-2019, x64-windows-release, true)	1m 22s
test-vcpkg-action-latest-vcpkg-release (macos-11, x64-osx-release, true)	46s
test-vcpkg-action (macos-11, x64-osx-release, true)	45s
test-vcpkg-action-latest-vcpkg-release (windows-2019, x64-windows-release, true)	1m 48s
test-vcpkg-action (windows-2019, x64-windows-release, true)	1m 37s
	14m 33s

Provide feedback