v3.7.0

=== Improvements ===
* Slightly improved compile times of benchmarks
* Made the resolution estimation in benchmarks slightly more precise
* Added new test case macro, `TEST_CASE_PERSISTENT_FIXTURE` (#2885, #1602)
  * Unlike `TEST_CASE_METHOD`, the same underlying instance is used for all partial runs of that test case
* **MASSIVELY** improved performance of the JUnit reporter when handling successful assertions (#2897)
  * For 1 test case and 10M assertions, the new reporter runs 3x faster and uses up only 8 MB of memory, while the old one needs 7 GB of memory.
* Reworked how output redirects works.
  * Combining a reporter writing to stdout with capturing reporter no longer leads to the capturing reporter seeing all of the other reporter's output.
  * The file based redirect no longer opens up a new temporary file for each partial test case run, so it will not run out of temporary files when running many tests in single process.

=== Miscellaneous ===
* Better documentation for matchers on thrown exceptions (`REQUIRE_THROWS_MATCHES`)
* Improved `catch_discover_tests`'s handling of environment paths (#2878)
  * It won't reorder paths in `DL_PATHS` or `DYLD_FRAMEWORK_PATHS` args
  * It won't overwrite the environment paths for test discovery
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