[READY] Add support for didChangeWorkspaceFolders #667

Job	Run time
C++ Lint	6m 6s
ubuntu-20.04 - C++ Benchmark	2m 0s
Windows MSVC 17 x64 - C++ Benchmark	3m 59s
ubuntu-20.04 - test run	22m 37s
Windows MSVC 17 x64 - test run	32m 15s
macos-12 - C++ Benchmark	2m 34s
Windows MSVC 17 x86 - test run	31m 16s
macos-12 - test run	30m 53s
Windows MSVC 16 x64 - test run	33m 36s
ubuntu-20.04 - with Clang compiler - test run	21m 26s
ubuntu-20.04 - without libclang completer - test run	22m 6s
	3h 28m 48s

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