chore(deps): update googletest to v1.16.0

[renovate-bot]

This PR contains the following updates:

Package	Type	Update	Change
com_google_googletest	http_archive	minor	v1.15.2 -> v1.16.0
google/googletest		minor	v1.15.2 -> v1.16.0

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Release Notes

google/googletest (com_google_googletest)

v1.16.0

Compare Source

Release Notes

GoogleTest will not accept patches of new features to the v1.16.x branch.
We recommend building GoogleTest from the latest commit instead.
Exceptional critical bug fixes may be considered.

C++ Language Support

• GoogleTest requires at least C++14 and follows Google's Foundational C++ Support Policy. See this table for a list of currently supported versions compilers, platforms, and build tools.
• The 1.16.x branch will be the last to support C++14. Future development will require at least C++17.

Notable Changes

• Bazel BUILD files now reference repositories by their canonical names from the Bazel Central Registry (google/googletest@cee1ba1). Users still using the old WORKSPACE system may need to use repo_mapping on repositories that still use the old names.
• Testsuite properties as are now exported as XML elements, not attributes (google/googletest@b4aae50).

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This change is 

[scotthart]

/gcbrun