Bump pygments from 2.8.0 to 2.8.1 (#5538)

Bumps [pygments](https://github.com/pygments/pygments) from 2.8.0 to 2.8.1.
- [Release notes](https://github.com/pygments/pygments/releases)
- [Changelog](https://github.com/pygments/pygments/blob/2.8.1/CHANGES)
- [Commits](pygments/pygments@2.8.0...2.8.1)

Signed-off-by: dependabot[bot] <support@github.com>

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

requirements/dev.txt

@@ -59,7 +59,7 @@ click==7.1.2
     #   black
     #   cherry-picker
     #   towncrier
-coverage==5.3.1
+coverage==5.5
     # via
     #   -r requirements/test.txt
     #   pytest-cov
@@ -83,7 +83,7 @@ flake8==3.8.4
     # via
     #   -r requirements/lint.txt
     #   flake8-pyi
-freezegun==1.0.0
+freezegun==1.1.0
     # via -r requirements/test.txt
 frozenlist==1.1.1
     # via
@@ -176,7 +176,7 @@ pyflakes==2.2.0
     #   -r requirements/lint.txt
     #   flake8
     #   flake8-pyi
-pygments==2.8.0
+pygments==2.8.1
     # via
     #   -r requirements/doc.txt
     #   sphinx
@@ -186,7 +186,7 @@ pyparsing==2.4.7
     # via
     #   -r requirements/lint.txt
     #   packaging
-pytest-cov==2.10.1
+pytest-cov==2.11.1
     # via -r requirements/test.txt
 pytest-mock==3.5.1
     # via -r requirements/test.txt
@@ -225,7 +225,7 @@ six==1.15.0
     #   virtualenv
 snowballstemmer==2.0.0
     # via sphinx
-sphinx==3.5.1
+sphinx==3.5.2
     # via
     #   -r requirements/doc.txt
     #   sphinxcontrib-asyncio

requirements/doc-spelling.txt

@@ -26,8 +26,6 @@ idna==2.10
     # via requests
 imagesize==1.2.0
     # via sphinx
-importlib-metadata==3.7.2
-    # via sphinxcontrib-spelling
 incremental==21.3.0
     # via towncrier
 jinja2==2.11.3
@@ -42,7 +40,7 @@ pillow==8.1.2
     # via blockdiag
 pyenchant==3.2.0
     # via sphinxcontrib-spelling
-pygments==2.8.0
+pygments==2.8.1
     # via
     #   -r requirements/doc.txt
     #   sphinx
@@ -54,7 +52,7 @@ requests==2.25.1
     # via sphinx
 snowballstemmer==2.1.0
     # via sphinx
-sphinx==3.5.1
+sphinx==3.5.2
     # via
     #   -r requirements/doc.txt
     #   sphinxcontrib-asyncio
@@ -82,14 +80,10 @@ toml==0.10.2
     # via towncrier
 towncrier==19.2.0
     # via -r requirements/doc.txt
-typing-extensions==3.7.4.3
-    # via importlib-metadata
 urllib3==1.26.3
     # via requests
 webcolors==1.11.1
     # via blockdiag
-zipp==3.4.1
-    # via importlib-metadata
 
 # The following packages are considered to be unsafe in a requirements file:
 setuptools==54.1.1