Bump actions/cache from 1 to 4 #1601

Job	Run time
macOS	14m 11s
Bazel	6m 56s
Test Big Endian	9m 38s
Ubuntu 18.04 (Build: Debug, Compilers: gcc-6/g++-6, Shared Library: true)	10m 25s
Ubuntu 18.04 (Build: Debug, Compilers: clang-6.0/clang++-6.0, Shared Library: true)	9m 2s
Ubuntu 18.04 (Build: Debug, Compilers: clang-6.0/clang++-6.0, Shared Library: false)	9m 7s
Ubuntu 18.04 (Build: Release, Compilers: gcc-6/g++-6, Shared Library: true)	14m 55s
Ubuntu 18.04 (Build: Release, Compilers: gcc-6/g++-6, Shared Library: false)	14m 55s
Ubuntu 18.04 (Build: Release, Compilers: clang-6.0/clang++-6.0, Shared Library: true)	14m 3s
Ubuntu 18.04 (Build: Release, Compilers: clang-6.0/clang++-6.0, Shared Library: false)	13m 46s
ASAN	7m 0s
UBSAN	7m 26s
Windows 2019 (Generator: MinGW Makefiles, Shared Library: true)	18m 48s
Windows 2019 (Generator: MinGW Makefiles, Shared Library: false)	19m 34s
Windows 2019 (Generator: Visual Studio 16 2019, Shared Library: true)	9m 2s
Windows 2019 (Generator: Visual Studio 16 2019, Shared Library: false)	9m 23s
	3h 8m 11s

Provide feedback