Bump certifi from 2019.6.16 to 2022.12.7 in /requirements

Bumps [certifi](https://github.com/certifi/python-certifi) from 2019.6.16 to 2022.12.7.
- [Release notes](https://github.com/certifi/python-certifi/releases)
- [Commits](certifi/python-certifi@2019.06.16...2022.12.07)

---
updated-dependencies:
- dependency-name: certifi
  dependency-type: direct:development
...

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

Author: dependabot[bot]

requirements/dev-3.6-dev.txt

@@ -4,7 +4,7 @@ atomicwrites==1.3.0       # via pytest
 attrs==19.1.0             # via black, pytest
 backcall==0.1.0           # via ipython
 black==19.3b0
-certifi==2019.6.16        # via requests
+certifi==2022.12.7        # via requests
 chardet==3.0.4            # via requests
 click==7.0                # via black
 coverage==4.5.3           # via coveralls, pytest-cov

requirements/dev-3.6.txt

@@ -5,7 +5,7 @@ attrs==19.1.0             # via black, pytest
 backcall==0.1.0           # via ipython
 black==19.3b0
 cachetools==3.1.1         # via google-auth
-certifi==2019.6.16        # via requests
+certifi==2022.12.7        # via requests
 chardet==3.0.4            # via requests
 click==7.0                # via black
 coverage==4.5.3           # via coveralls, pytest-cov

requirements/dev-3.7-dev.txt

@@ -5,7 +5,7 @@ attrs==19.1.0             # via black, pytest
 backcall==0.1.0           # via ipython
 black==19.3b0
 cachetools==3.1.1         # via google-auth
-certifi==2019.6.16        # via requests
+certifi==2022.12.7        # via requests
 chardet==3.0.4            # via requests
 click==7.0                # via black
 coverage==4.5.3           # via coveralls, pytest-cov

requirements/dev-3.7.txt

@@ -5,7 +5,7 @@ attrs==19.1.0             # via black, pytest
 backcall==0.1.0           # via ipython
 black==19.3b0
 cachetools==3.1.1         # via google-auth
-certifi==2019.6.16        # via requests
+certifi==2022.12.7        # via requests
 chardet==3.0.4            # via requests
 click==7.0                # via black
 coverage==4.5.3           # via coveralls, pytest-cov