Bump coverage from 5.0.3 to 5.1 in /packages/postgres-database

Bumps [coverage](https://github.com/nedbat/coveragepy) from 5.0.3 to 5.1.
- [Release notes](https://github.com/nedbat/coveragepy/releases)
- [Changelog](https://github.com/nedbat/coveragepy/blob/master/CHANGES.rst)
- [Commits](nedbat/coveragepy@coverage-5.0.3...coverage-5.1)

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

Author: dependabot-preview[bot]

packages/postgres-database/requirements/_test.in

@@ -11,7 +11,7 @@ aiopg[sa]
 faker
 
 # testing
-coverage==5.0.3 # TODO: Downgraded because of a bug https://github.com/nedbat/coveragepy/issues/716
+coverage==5.1 # TODO: Downgraded because of a bug https://github.com/nedbat/coveragepy/issues/716
 pytest~=5.3.5  # Bug in pytest-sugar https://github.com/Teemu/pytest-sugar/issues/187
 pytest-cov
 pytest-aiohttp  # incompatible with pytest-asyncio. See https://github.com/pytest-dev/pytest-asyncio/issues/76

packages/postgres-database/requirements/_test.txt

@@ -16,14 +16,12 @@ bump2version==1.0.0       # via -r requirements/../../../requirements.txt
 certifi==2019.11.28       # via -r requirements/_migration.txt, requests
 chardet==3.0.4            # via -r requirements/_migration.txt, aiohttp, requests
 click==7.1.1              # via -r requirements/_migration.txt, black, pip-tools
-coverage==5.0.3           # via -r requirements/_test.in, coveralls, pytest-cov
+coverage==5.1             # via -r requirements/_test.in, coveralls, pytest-cov
 coveralls==1.11.1         # via -r requirements/_test.in
 docker==4.2.0             # via -r requirements/_migration.txt
 docopt==0.6.2             # via coveralls
 faker==4.0.2              # via -r requirements/_test.in
-idna-ssl==1.1.0           # via aiohttp
 idna==2.8                 # via -r requirements/_migration.txt, requests, yarl
-importlib-metadata==1.6.0  # via pluggy, pytest
 isort==4.3.21             # via pylint
 lazy-object-proxy==1.4.3  # via astroid
 mako==1.0.12              # via -r requirements/_migration.txt, alembic
@@ -56,11 +54,9 @@ sqlalchemy[postgresql_psycopg2binary]==1.3.5  # via -r requirements/_migration.t
 tenacity==6.1.0           # via -r requirements/_migration.txt
 text-unidecode==1.3       # via faker
 toml==0.10.0              # via black
-typed-ast==1.4.1          # via astroid, black
-typing-extensions==3.7.4.2  # via aiohttp
+typed-ast==1.4.1          # via black
 urllib3==1.25.8           # via -r requirements/_migration.txt, requests
 wcwidth==0.1.8            # via pytest
 websocket-client==0.56.0  # via -r requirements/_migration.txt, docker
 wrapt==1.11.2             # via astroid
 yarl==1.4.2               # via -r requirements/_migration.txt, aiohttp
-zipp==3.1.0               # via importlib-metadata