Bump pyyaml from 5.3.1 to 5.4

Bumps [pyyaml](https://github.com/yaml/pyyaml) from 5.3.1 to 5.4.
- [Release notes](https://github.com/yaml/pyyaml/releases)
- [Changelog](https://github.com/yaml/pyyaml/blob/master/CHANGES)
- [Commits](yaml/pyyaml@5.3.1...5.4)

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

requirements.txt

@@ -4,102 +4,263 @@
 #
 #    pip-compile
 #
-appdirs==1.4.4            # via black
-asgiref==3.3.1            # via django
-astroid==2.4.1            # via prospector, pylint, pylint-celery, pylint-flask, requirements-detector
-attrs==20.3.0             # via pytest
-backcall==0.2.0           # via ipython
-black==20.8b1             # via -r requirements.in
-bleach==3.2.1             # via django-markdownify
-certifi==2020.12.5        # via requests
-chardet==4.0.0            # via requests
-click==7.1.2              # via black
-coreapi==2.3.3            # via django-rest-swagger, openapi-codec
-coreschema==0.0.4         # via coreapi
-coverage==5.3.1           # via -r requirements.in, pytest-cov
-decorator==4.4.2          # via ipython
-django-axes==5.12.0       # via -r requirements.in
-django-crispy-forms==1.10.0  # via -r requirements.in
-django-debug-toolbar==3.2  # via -r requirements.in
-django-environ==0.4.5     # via -r requirements.in
-django-guardian==2.3.0    # via -r requirements.in
-django-ical==1.7.1        # via -r requirements.in
-django-ipware==3.0.2      # via django-axes
-django-markdownify==0.8.2  # via -r requirements.in
-django-recaptcha2==1.4.1  # via -r requirements.in
-django-recurrence==1.10.3  # via django-ical
-django-rest-swagger==2.2.0  # via -r requirements.in
-django==3.1.5             # via -r requirements.in, django-axes, django-debug-toolbar, django-guardian, django-ical, django-markdownify, django-recurrence, djangorestframework
-djangorestframework==3.12.2  # via -r requirements.in, django-rest-swagger
-dodgy==0.2.1              # via prospector
-flake8-polyfill==1.0.2    # via pep8-naming
-flake8==3.8.4             # via flake8-polyfill
-future==0.18.2            # via -r requirements.in
-gunicorn==20.0.4          # via -r requirements.in
-icalendar==4.0.7          # via -r requirements.in, django-ical
-idna==2.10                # via requests
-iniconfig==1.1.1          # via pytest
-ipython-genutils==0.2.0   # via traitlets
-ipython==7.19.0           # via -r requirements.in
-isort==4.3.21             # via pylint
-itypes==1.2.0             # via coreapi
-jedi==0.18.0              # via ipython
-jinja2==2.11.2            # via coreschema
-lazy-object-proxy==1.4.3  # via astroid
-markdown==3.3.3           # via django-markdownify
-markupsafe==1.1.1         # via jinja2
-mccabe==0.6.1             # via flake8, prospector, pylint
-mypy-extensions==0.4.3    # via black, mypy
-mypy==0.790               # via -r requirements.in
-openapi-codec==1.3.2      # via django-rest-swagger
-packaging==20.8           # via bleach, pytest
-parso==0.8.1              # via jedi
-passlib==1.7.4            # via -r requirements.in
-pathspec==0.8.1           # via black
-pep8-naming==0.10.0       # via prospector
-pexpect==4.8.0            # via ipython
-pickleshare==0.7.5        # via ipython
-pluggy==0.13.1            # via pytest
-prompt-toolkit==3.0.10    # via ipython
-prospector==1.3.1         # via -r requirements.in
-psycopg2-binary==2.8.6    # via -r requirements.in
-ptyprocess==0.7.0         # via pexpect
-py==1.10.0                # via pytest
-pycodestyle==2.6.0        # via flake8, prospector
-pydocstyle==5.1.1         # via prospector
-pyflakes==2.2.0           # via flake8, prospector
-pygments==2.7.4           # via ipython
-pylint-celery==0.3        # via prospector
-pylint-django==2.1.0      # via prospector
-pylint-flask==0.6         # via prospector
-pylint-plugin-utils==0.6  # via prospector, pylint-celery, pylint-django, pylint-flask
-pylint==2.5.3             # via prospector, pylint-celery, pylint-django, pylint-flask, pylint-plugin-utils
-pyparsing==2.4.7          # via packaging
-pytest-cov==2.11.0        # via -r requirements.in
-pytest-django==4.1.0      # via -r requirements.in
-pytest-subtests==0.4.0    # via -r requirements.in
-pytest==6.2.1             # via -r requirements.in, pytest-cov, pytest-django, pytest-subtests
-python-dateutil==2.8.1    # via django-recurrence, icalendar
-pytz==2020.5              # via -r requirements.in, django, django-recurrence, icalendar
-pyyaml==5.3.1             # via prospector
-regex==2020.11.13         # via black
-requests==2.25.1          # via coreapi, django-recaptcha2
-requirements-detector==0.7  # via prospector
-setoptconf==0.2.0         # via prospector
-simplejson==3.17.2        # via django-rest-swagger
-six==1.15.0               # via astroid, bleach, python-dateutil
-snowballstemmer==2.0.0    # via pydocstyle
-sqlparse==0.4.1           # via django, django-debug-toolbar
-toml==0.10.2              # via black, pylint, pytest
-traitlets==5.0.5          # via ipython
-typed-ast==1.4.2          # via black, mypy
-typing-extensions==3.7.4.3  # via black, mypy
-uritemplate==3.0.1        # via coreapi
-urllib3==1.26.2           # via requests
-wcwidth==0.2.5            # via prompt-toolkit
-webencodings==0.5.1       # via bleach
-whitenoise==5.2.0         # via -r requirements.in
-wrapt==1.12.1             # via astroid
+appdirs==1.4.4
+    # via black
+asgiref==3.3.1
+    # via django
+astroid==2.4.1
+    # via
+    #   prospector
+    #   pylint
+    #   pylint-celery
+    #   pylint-flask
+    #   requirements-detector
+attrs==20.3.0
+    # via pytest
+backcall==0.2.0
+    # via ipython
+black==20.8b1
+    # via -r requirements.in
+bleach==3.2.1
+    # via django-markdownify
+certifi==2020.12.5
+    # via requests
+chardet==4.0.0
+    # via requests
+click==7.1.2
+    # via black
+coreapi==2.3.3
+    # via
+    #   django-rest-swagger
+    #   openapi-codec
+coreschema==0.0.4
+    # via coreapi
+coverage==5.3.1
+    # via
+    #   -r requirements.in
+    #   pytest-cov
+decorator==4.4.2
+    # via ipython
+django-axes==5.12.0
+    # via -r requirements.in
+django-crispy-forms==1.10.0
+    # via -r requirements.in
+django-debug-toolbar==3.2
+    # via -r requirements.in
+django-environ==0.4.5
+    # via -r requirements.in
+django-guardian==2.3.0
+    # via -r requirements.in
+django-ical==1.7.1
+    # via -r requirements.in
+django-ipware==3.0.2
+    # via django-axes
+django-markdownify==0.8.2
+    # via -r requirements.in
+django-recaptcha2==1.4.1
+    # via -r requirements.in
+django-recurrence==1.10.3
+    # via django-ical
+django-rest-swagger==2.2.0
+    # via -r requirements.in
+django==3.1.5
+    # via
+    #   -r requirements.in
+    #   django-axes
+    #   django-debug-toolbar
+    #   django-guardian
+    #   django-ical
+    #   django-markdownify
+    #   django-recurrence
+    #   djangorestframework
+djangorestframework==3.12.2
+    # via
+    #   -r requirements.in
+    #   django-rest-swagger
+dodgy==0.2.1
+    # via prospector
+flake8-polyfill==1.0.2
+    # via pep8-naming
+flake8==3.8.4
+    # via flake8-polyfill
+future==0.18.2
+    # via -r requirements.in
+gunicorn==20.0.4
+    # via -r requirements.in
+icalendar==4.0.7
+    # via
+    #   -r requirements.in
+    #   django-ical
+idna==2.10
+    # via requests
+iniconfig==1.1.1
+    # via pytest
+ipython-genutils==0.2.0
+    # via traitlets
+ipython==7.19.0
+    # via -r requirements.in
+isort==4.3.21
+    # via pylint
+itypes==1.2.0
+    # via coreapi
+jedi==0.18.0
+    # via ipython
+jinja2==2.11.2
+    # via coreschema
+lazy-object-proxy==1.4.3
+    # via astroid
+markdown==3.3.3
+    # via django-markdownify
+markupsafe==1.1.1
+    # via jinja2
+mccabe==0.6.1
+    # via
+    #   flake8
+    #   prospector
+    #   pylint
+mypy-extensions==0.4.3
+    # via
+    #   black
+    #   mypy
+mypy==0.790
+    # via -r requirements.in
+openapi-codec==1.3.2
+    # via django-rest-swagger
+packaging==20.8
+    # via
+    #   bleach
+    #   pytest
+parso==0.8.1
+    # via jedi
+passlib==1.7.4
+    # via -r requirements.in
+pathspec==0.8.1
+    # via black
+pep8-naming==0.10.0
+    # via prospector
+pexpect==4.8.0
+    # via ipython
+pickleshare==0.7.5
+    # via ipython
+pluggy==0.13.1
+    # via pytest
+prompt-toolkit==3.0.10
+    # via ipython
+prospector==1.3.1
+    # via -r requirements.in
+psycopg2-binary==2.8.6
+    # via -r requirements.in
+ptyprocess==0.7.0
+    # via pexpect
+py==1.10.0
+    # via pytest
+pycodestyle==2.6.0
+    # via
+    #   flake8
+    #   prospector
+pydocstyle==5.1.1
+    # via prospector
+pyflakes==2.2.0
+    # via
+    #   flake8
+    #   prospector
+pygments==2.7.4
+    # via ipython
+pylint-celery==0.3
+    # via prospector
+pylint-django==2.1.0
+    # via prospector
+pylint-flask==0.6
+    # via prospector
+pylint-plugin-utils==0.6
+    # via
+    #   prospector
+    #   pylint-celery
+    #   pylint-django
+    #   pylint-flask
+pylint==2.5.3
+    # via
+    #   prospector
+    #   pylint-celery
+    #   pylint-django
+    #   pylint-flask
+    #   pylint-plugin-utils
+pyparsing==2.4.7
+    # via packaging
+pytest-cov==2.11.0
+    # via -r requirements.in
+pytest-django==4.1.0
+    # via -r requirements.in
+pytest-subtests==0.4.0
+    # via -r requirements.in
+pytest==6.2.1
+    # via
+    #   -r requirements.in
+    #   pytest-cov
+    #   pytest-django
+    #   pytest-subtests
+python-dateutil==2.8.1
+    # via
+    #   django-recurrence
+    #   icalendar
+pytz==2020.5
+    # via
+    #   -r requirements.in
+    #   django
+    #   django-recurrence
+    #   icalendar
+pyyaml==5.4
+    # via prospector
+regex==2020.11.13
+    # via black
+requests==2.25.1
+    # via
+    #   coreapi
+    #   django-recaptcha2
+requirements-detector==0.7
+    # via prospector
+setoptconf==0.2.0
+    # via prospector
+simplejson==3.17.2
+    # via django-rest-swagger
+six==1.15.0
+    # via
+    #   astroid
+    #   bleach
+    #   python-dateutil
+snowballstemmer==2.0.0
+    # via pydocstyle
+sqlparse==0.4.1
+    # via
+    #   django
+    #   django-debug-toolbar
+toml==0.10.2
+    # via
+    #   black
+    #   pylint
+    #   pytest
+traitlets==5.0.5
+    # via ipython
+typed-ast==1.4.2
+    # via
+    #   black
+    #   mypy
+typing-extensions==3.7.4.3
+    # via
+    #   black
+    #   mypy
+uritemplate==3.0.1
+    # via coreapi
+urllib3==1.26.2
+    # via requests
+wcwidth==0.2.5
+    # via prompt-toolkit
+webencodings==0.5.1
+    # via bleach
+whitenoise==5.2.0
+    # via -r requirements.in
+wrapt==1.12.1
+    # via astroid
 
 # The following packages are considered to be unsafe in a requirements file:
 # setuptools