build(deps): bump jinja2 from 2.11.2 to 2.11.3 in /tests

Bumps [jinja2](https://github.com/pallets/jinja) from 2.11.2 to 2.11.3.
- [Release notes](https://github.com/pallets/jinja/releases)
- [Changelog](https://github.com/pallets/jinja/blob/master/CHANGES.rst)
- [Commits](pallets/jinja@2.11.2...2.11.3)

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

tests/requirements.txt

@@ -16,15 +16,11 @@ flask==0.12.5
  # via pytest-flask
 future==0.18.2
  # via radon
-importlib-metadata==3.1.0
- # via
- # pluggy
- # pytest
 iniconfig==1.1.1
  # via pytest
 itsdangerous==1.1.0
  # via flask
-jinja2==2.11.2
+jinja2==2.11.3
  # via flask
 mando==0.6.4
  # via radon
@@ -38,15 +34,15 @@ py==1.9.0
  # via pytest
 pyparsing==2.4.7
  # via packaging
-pytest-cov==2.10.1
- # via -r requirements.in
-pytest-flask==1.1.0
- # via -r requirements.in
 pytest==6.1.2
  # via
  # -r requirements.in
  # pytest-cov
  # pytest-flask
+pytest-cov==2.10.1
+ # via -r requirements.in
+pytest-flask==1.1.0
+ # via -r requirements.in
 radon==4.3.2
  # via -r requirements.in
 six==1.15.0
@@ -59,5 +55,3 @@ werkzeug==0.16.1
  # via
  # flask
  # pytest-flask
-zipp==3.4.0
- # via importlib-metadata