Bump tox from 4.18.0 to 4.21.0

Bumps [tox](https://github.com/tox-dev/tox) from 4.18.0 to 4.21.0.
- [Release notes](https://github.com/tox-dev/tox/releases)
- [Changelog](https://github.com/tox-dev/tox/blob/main/docs/changelog.rst)
- [Commits](tox-dev/tox@4.18.0...4.21.0)

---
updated-dependencies:
- dependency-name: tox
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

CI/requirements_ci.in

@@ -1 +1 @@
-tox==4.18.0
+tox==4.21.0

CI/requirements_ci.txt

@@ -4,9 +4,9 @@
 #
 #    pip-compile --generate-hashes --output-file=requirements_ci.txt requirements_ci.in
 #
-cachetools==5.4.0 \
-    --hash=sha256:3ae3b49a3d5e28a77a0be2b37dbcb89005058959cb2323858c2657c4a8cab474 \
-    --hash=sha256:b8adc2e7c07f105ced7bc56dbb6dfbe7c4a00acce20e2227b3f355be89bc6827
+cachetools==5.5.0 \
+    --hash=sha256:02134e8439cdc2ffb62023ce1debca2944c3f289d66bb17ead3ab3dede74b292 \
+    --hash=sha256:2cc24fb4cbe39633fb7badd9db9ca6295d766d9c2995f245725a46715d050f2a
     # via tox
 chardet==5.2.0 \
     --hash=sha256:1b3b6ff479a8c414bc3fa2c0852995695c4a026dcd6d0633b2dd092ca39c1cf7 \
@@ -20,9 +20,9 @@ distlib==0.3.8 \
     --hash=sha256:034db59a0b96f8ca18035f36290806a9a6e6bd9d1ff91e45a7f172eb17e51784 \
     --hash=sha256:1530ea13e350031b6312d8580ddb6b27a104275a31106523b8f123787f494f64
     # via virtualenv
-filelock==3.15.4 \
-    --hash=sha256:2207938cbc1844345cb01a5a95524dae30f0ce089eba5b00378295a17e3e90cb \
-    --hash=sha256:6ca1fffae96225dab4c6eaf1c4f4f28cd2568d3ec2a44e15a08520504de468e7
+filelock==3.16.1 \
+    --hash=sha256:2082e5703d51fbf98ea75855d9d5527e33d8ff23099bec374a134febee6946b0 \
+    --hash=sha256:c249fbfcd5db47e5e2d6d62198e565475ee65e4831e2561c8e313fa7eb961435
     # via
     #   tox
     #   virtualenv
@@ -32,31 +32,35 @@ packaging==24.1 \
     # via
     #   pyproject-api
     #   tox
-platformdirs==4.2.2 \
-    --hash=sha256:2d7a1657e36a80ea911db832a8a6ece5ee53d8de21edd5cc5879af6530b1bfee \
-    --hash=sha256:38b7b51f512eed9e84a22788b4bce1de17c0adb134d6becb09836e37d8654cd3
+platformdirs==4.3.6 \
+    --hash=sha256:357fb2acbc885b0419afd3ce3ed34564c13c9b95c89360cd9563f73aa5e2b907 \
+    --hash=sha256:73e575e1408ab8103900836b97580d5307456908a03e92031bab39e4554cc3fb
     # via
     #   tox
     #   virtualenv
 pluggy==1.5.0 \
     --hash=sha256:2cffa88e94fdc978c4c574f15f9e59b7f4201d439195c3715ca9e2486f1d0cf1 \
     --hash=sha256:44e1ad92c8ca002de6377e165f3e0f1be63266ab4d554740532335b9d75ea669
     # via tox
-pyproject-api==1.7.1 \
-    --hash=sha256:2dc1654062c2b27733d8fd4cdda672b22fe8741ef1dde8e3a998a9547b071eeb \
-    --hash=sha256:7ebc6cd10710f89f4cf2a2731710a98abce37ebff19427116ff2174c9236a827
+pyproject-api==1.8.0 \
+    --hash=sha256:3d7d347a047afe796fd5d1885b1e391ba29be7169bd2f102fcd378f04273d228 \
+    --hash=sha256:77b8049f2feb5d33eefcc21b57f1e279636277a8ac8ad6b5871037b243778496
     # via tox
 tomli==2.0.1 \
     --hash=sha256:939de3e7a6161af0c887ef91b7d41a53e7c5a1ca976325f429cb46ea9bc30ecc \
     --hash=sha256:de526c12914f0c550d15924c62d72abc48d6fe7364aa87328337a31007fe8a4f
     # via
     #   pyproject-api
     #   tox
-tox==4.18.0 \
-    --hash=sha256:0a457400cf70615dc0627eb70d293e80cd95d8ce174bb40ac011011f0c03a249 \
-    --hash=sha256:5dfa1cab9f146becd6e351333a82f9e0ade374451630ba65ee54584624c27b58
-    # via -r requirements_ci.in
-virtualenv==20.26.3 \
-    --hash=sha256:4c43a2a236279d9ea36a0d76f98d84bd6ca94ac4e0f4a3b9d46d05e10fea542a \
-    --hash=sha256:8cc4a31139e796e9a7de2cd5cf2489de1217193116a8fd42328f1bd65f434589
+tox==4.21.0 \
+    --hash=sha256:693ac51378255d34ad7aab6dd2ce9ab6a1cf1924eb930183fde850ad503b681d \
+    --hash=sha256:e64dd9847ff3a7ec90368be412d7efe61a39caf043222ffbe9ad638ea435f6f6
+    # via -r CI/requirements_ci.in
+typing-extensions==4.12.2 \
+    --hash=sha256:04e5ca0351e0f3f85c6853954072df659d0d13fac324d0072316b67d7794700d \
+    --hash=sha256:1a7ead55c7e559dd4dee8856e3a88b41225abfe1ce8df57b7c13915fe121ffb8
+    # via tox
+virtualenv==20.26.6 \
+    --hash=sha256:280aede09a2a5c317e409a00102e7077c6432c5a38f0ef938e643805a7ad2c48 \
+    --hash=sha256:7345cc5b25405607a624d8418154577459c3e0277f5466dd79c49d5e492995f2
     # via tox