Bump pypa/cibuildwheel from 2.20.0 to 2.21.0 (#261)

Bumps [pypa/cibuildwheel](https://github.com/pypa/cibuildwheel) from 2.20.0 to 2.21.0.
- [Release notes](https://github.com/pypa/cibuildwheel/releases)
- [Changelog](https://github.com/pypa/cibuildwheel/blob/main/docs/changelog.md)
- [Commits](pypa/cibuildwheel@v2.20.0...v2.21.0)

---
updated-dependencies:
- dependency-name: pypa/cibuildwheel
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/build_wheels.yml

@@ -39,7 +39,7 @@ jobs:
 
       - name: Wheels macOS / Linux
         if: runner.os != 'Windows'
-        uses: pypa/cibuildwheel@v2.20.0
+        uses: pypa/cibuildwheel@v2.21.0
         env:
           CIBW_BEFORE_ALL_LINUX: ./tools/install_talib.sh
           CIBW_BEFORE_ALL_MACOS: brew install ta-lib
@@ -56,7 +56,7 @@ jobs:
 
       - name: Wheels Windows
         if: runner.os == 'Windows'
-        uses: pypa/cibuildwheel@v2.20.0
+        uses: pypa/cibuildwheel@v2.21.0
         env:
           CIBW_BUILD: "${{ matrix.python }}-win_amd64"
           CIBW_BEFORE_TEST_WINDOWS: >