GH-93: change formatter (#94)

* Change formatter from yapf to black

Yapf is uncommon formatter,
requiring it makes process of onboarding new contributors harder.

Yapf with non-standard configuration as well introduces less common coding style,
which might slightly confuse some developers.

Black with standard configuration is the most popular formatting tool.

* Replace yapf with black in dependencies

Remove plugins
Update poetry.lock

.github/workflows/tests.yml

@@ -116,8 +116,8 @@ jobs:
         run: |
           source .venv/bin/activate
           isort -m 9 --line-length 160 $MODULE_NAME tests --check-only
-          pylint --load-plugins pylint_quotes $MODULE_NAME tests
+          pylint $MODULE_NAME tests
           docformatter --wrap-summaries 160 --wrap-descriptions 160 -cr $MODULE_NAME tests
-          yapf -rd $MODULE_NAME tests
+          black --check $MODULE_NAME tests
           mypy -V
           mypy $MODULE_NAME tests

.gitignore

@@ -15,6 +15,7 @@ downloads/
 eggs/
 .eggs/
 lib/
+Lib/
 lib64/
 parts/
 sdist/
@@ -129,4 +130,4 @@ dmypy.json
 .pyre/
 
 # IDE files
-.idea
+.idea

.pylintrc

@@ -1,6 +1,4 @@
 [MASTER]
-# init-hook="from pylint.config import find_pylintrc; import os, sys; sys.path.append(os.path.dirname(find_pylintrc())); import pylint_venv; pylint_venv.inithook('./.venv')"
-load-plugins=pylint_absolute_imports, pylint_quotes
 ignore=.venv,setup.py
 
 [DESIGN]
@@ -26,11 +24,6 @@ max-locals=20
 # Make docstring compulsory for all functions
 no-docstring-rgx=$^ 
 
-# MODULE-PARAM: pylint-quotes
-string-quote=single
-triple-quote=double
-docstring-quote=double
-
 [ELIF]
 
 # Maximum number of nested blocks for function/method body