Bump pytest-mock from 3.3.1 to 3.6.1

Bumps [pytest-mock](https://github.com/pytest-dev/pytest-mock) from 3.3.1 to 3.6.1.
- [Release notes](https://github.com/pytest-dev/pytest-mock/releases)
- [Changelog](https://github.com/pytest-dev/pytest-mock/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest-mock@v3.3.1...v3.6.1)

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

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

requirements.txt

@@ -10,16 +10,21 @@ click==7.1.2
     # via
     #   -r requirements.in
     #   pip-tools
-coverage==5.0.4
+coverage==5.5
     # via pytest-cov
 croniter==0.3.34
     # via -r requirements.in
-flake8-isort==4.0.0
-    # via -r requirements.in
 flake8==3.8.4
     # via
     #   -r requirements.in
     #   flake8-isort
+flake8-isort==4.0.0
+    # via -r requirements.in
+importlib-metadata==4.5.0
+    # via
+    #   flake8
+    #   pluggy
+    #   pytest
 iniconfig==1.1.1
     # via pytest
 isort==4.3.21
@@ -42,15 +47,15 @@ pyflakes==2.2.0
     # via flake8
 pyparsing==2.4.6
     # via packaging
-pytest-cov==2.9.0
-    # via -r requirements.in
-pytest-mock==3.3.1
-    # via -r requirements.in
 pytest==6.2.1
     # via
     #   -r requirements.in
     #   pytest-cov
     #   pytest-mock
+pytest-cov==2.12.1
+    # via -r requirements.in
+pytest-mock==3.6.1
+    # via -r requirements.in
 python-dateutil==2.7.3
     # via croniter
 pytz==2020.1
@@ -65,7 +70,13 @@ six==1.11.0
 testfixtures==6.14.0
     # via flake8-isort
 toml==0.10.2
-    # via pytest
+    # via
+    #   pytest
+    #   pytest-cov
+typing-extensions==3.10.0.0
+    # via importlib-metadata
+zipp==3.4.1
+    # via importlib-metadata
 
 # The following packages are considered to be unsafe in a requirements file:
 # pip