Use tested yml and toml files

Author: uvchik

.stickler.yml

@@ -2,3 +2,11 @@ linters:
     flake8:
       python: 3
       max-line-length: 79
+      select: C,E,F,W,B,B950
+      ignore: E203, E501, W503
+    black:
+      config: ./pyproject.toml
+      fixer: true
+
+fixers:
+    enable: true

pyproject.toml

@@ -1,5 +1,5 @@
 [tool.black]
-line-length = 88
+line-length = 79
 target-version = ['py36', 'py37', 'py38']
 include = '\.pyi?$'
 exclude = '''
@@ -15,4 +15,4 @@ exclude = '''
   | build
   | dist
 )/
-'''
+'''