v3.1.0

--- Improvements
* Improved suppression of `-Wparentheses` for older GCCs
  * Turns out that even GCC 9 does not properly handle `_Pragma`s in the C++ frontend.
* Added type constraints onto `random` generator (#2433)
  * These constraints copy what the standard says for the underlying `std::uniform_int_distribution`
* Suppressed -Wunused-variable from nvcc (#2306, #2427)
* Suppressed -Wunused-variable from MinGW (#2132)
* Added All/Any/NoneTrue range matchers (#2319)
  * These check that all/any/none of boolean values in a range are true.
* The JUnit reporter now normalizes classnames from C++ namespaces to Java-like namespaces (#2468)
  * This provides better support for other JUnit based tools.
* The Bazel support now understands `BAZEL_TEST` environment variable (#2459)
  * The `CATCH_CONFIG_BAZEL_SUPPORT` configuration option is also still supported.
* Returned support for compiling Catch2 with GCC 5 (#2448)
  * This required removing inherited constructors from Catch2's internals.
  * I recommend updating to a newer GCC anyway.
* `catch_discover_tests` now has a new options for setting library load path(s) when running the Catch2 binary (#2467)

--- Fixes
* Fixed crash when listing listeners without any registered listeners (#2442)
* Fixed nvcc compilation error in constructor benchmarking helper (#2477)
* Catch2's CMakeList supports pre-3.12 CMake again (#2428)
  * The gain from requiring CMake 3.12 was very minor, but y'all should really update to newer CMake

--- Miscellaneous
* Fixed SelfTest build on MinGW (#2447)
* The in-repo conan recipe exports the CMake helper (#2460)
* Added experimental CMake script to showcase using test case sharding together with CTest
  * Compared to `catch_discover_tests`, it supports very limited number of options and customization
* Added documentation page on best practices when running Catch2 tests
* Catch2 can be built as a dynamic library (#2397, #2398)
  * Note that Catch2 does not have visibility annotations, and you are responsible for ensuring correct visibility built into the resulting library.
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