Update dependency flake8-rst-docstrings to ^0.0.13

This MR contains the following updates:

Package	Type	Update	Change
flake8-rst-docstrings	dev-dependencies	patch	^0.0.12 -> ^0.0.13

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pyproject.toml

@@ -77,7 +77,7 @@ flake8-mypy = "^17.8.0"
 flake8-bandit = "^2.1.2"
 flake8-builtins = "^1.4.1"
 flake8-docstrings = "^1.5.0"
-flake8-rst-docstrings = "^0.0.12"
+flake8-rst-docstrings = "^0.0.13"
 black = "^19.10b0"
 flake8-black = "^0.1.1"
 isort = "^4.3.21"