Bump black from 21.6b0 to 21.7b0 (#901)

Bumps [black](https://github.com/psf/black) from 21.6b0 to 21.7b0.
- [Release notes](https://github.com/psf/black/releases)
- [Changelog](https://github.com/psf/black/blob/main/CHANGES.md)
- [Commits](https://github.com/psf/black/commits)

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

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

poetry.lock

@@ -60,7 +60,7 @@ Babel = "*"
 
 [[package]]
 name = "black"
-version = "21.6b0"
+version = "21.7b0"
 description = "The uncompromising code formatter."
 category = "dev"
 optional = false
@@ -72,7 +72,7 @@ click = ">=7.1.2"
 mypy-extensions = ">=0.4.3"
 pathspec = ">=0.8.1,<1"
 regex = ">=2020.1.8"
-toml = ">=0.10.1"
+tomli = ">=0.2.6,<2.0.0"
 typed-ast = {version = ">=1.4.2", markers = "python_version < \"3.8\""}
 typing-extensions = {version = ">=3.7.4", markers = "python_version < \"3.8\""}
 
@@ -721,6 +721,14 @@ category = "dev"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
 
+[[package]]
+name = "tomli"
+version = "1.0.4"
+description = "A lil' TOML parser"
+category = "dev"
+optional = false
+python-versions = ">=3.6"
+
 [[package]]
 name = "tomlkit"
 version = "0.7.2"
@@ -800,7 +808,7 @@ testing = ["pytest (>=4.6)", "pytest-checkdocs (>=2.4)", "pytest-flake8", "pytes
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.7"
-content-hash = "746e571a999f199b657fbf07c7773793c3c0f5408ca7d6849d2aa904ae52a98c"
+content-hash = "822a48d10ce0be4507c0ed631ac3c0ba986454cf9621e25c4ad9cbd2b6603a0e"
 
 [metadata.files]
 alabaster = [
@@ -827,8 +835,8 @@ babelgladeextractor = [
     {file = "BabelGladeExtractor-0.7.0.tar.bz2", hash = "sha256:bcf805e28b4bb18c8b6909a65a7cf5c7c2bcbf4ae50b164878c9682d22271798"},
 ]
 black = [
-    {file = "black-21.6b0-py3-none-any.whl", hash = "sha256:dfb8c5a069012b2ab1e972e7b908f5fb42b6bbabcba0a788b86dc05067c7d9c7"},
-    {file = "black-21.6b0.tar.gz", hash = "sha256:dc132348a88d103016726fe360cb9ede02cecf99b76e3660ce6c596be132ce04"},
+    {file = "black-21.7b0-py3-none-any.whl", hash = "sha256:1c7aa6ada8ee864db745b22790a32f94b2795c253a75d6d9b5e439ff10d23116"},
+    {file = "black-21.7b0.tar.gz", hash = "sha256:c8373c6491de9362e39271630b65b964607bc5c79c83783547d76c839b3aa219"},
 ]
 certifi = [
     {file = "certifi-2021.5.30-py2.py3-none-any.whl", hash = "sha256:50b1e4f8446b06f41be7dd6338db18e0990601dce795c2b1686458aa7e8fa7d8"},
@@ -1235,6 +1243,10 @@ toml = [
     {file = "toml-0.10.2-py2.py3-none-any.whl", hash = "sha256:806143ae5bfb6a3c6e736a764057db0e6a0e05e338b5630894a5f779cabb4f9b"},
     {file = "toml-0.10.2.tar.gz", hash = "sha256:b3bda1d108d5dd99f4a20d24d9c348e91c4db7ab1b749200bded2f839ccbe68f"},
 ]
+tomli = [
+    {file = "tomli-1.0.4-py3-none-any.whl", hash = "sha256:0713b16ff91df8638a6a694e295c8159ab35ba93e3424a626dd5226d386057be"},
+    {file = "tomli-1.0.4.tar.gz", hash = "sha256:be670d0d8d7570fd0ea0113bd7bb1ba3ac6706b4de062cc4c952769355c9c268"},
+]
 tomlkit = [
     {file = "tomlkit-0.7.2-py2.py3-none-any.whl", hash = "sha256:173ad840fa5d2aac140528ca1933c29791b79a374a0861a80347f42ec9328117"},
     {file = "tomlkit-0.7.2.tar.gz", hash = "sha256:d7a454f319a7e9bd2e249f239168729327e4dd2d27b17dc68be264ad1ce36754"},

pyproject.toml

@@ -49,7 +49,7 @@ pytest = "^6.2"
 pytest-cov = "^2.12"
 pytest-mock = "^3.6.1"
 pytest-runner = "^5.3"
-black = "^21.6b0"
+black = "^21.7b0"
 mypy = "0.910"
 pre-commit = "^2.12"
 sphinx = "^4.1"