Drop py 36 (#268)

* Update run-tests.yml

* Update README.md

* Update tox.ini

Author: benkiel

.github/workflows/run-tests.yml

@@ -18,15 +18,11 @@ jobs:
     if: "! contains(toJSON(github.event.commits.*.message), '[skip ci]')"
     strategy:
       matrix:
-        python-version: [3.6, 3.7, 3.8, 3.9]
+        python-version: [3.7, 3.8, 3.9]
         platform: [ubuntu-latest, macos-latest, windows-latest]
         exclude: # Only test on the oldest and latest supported stable Python on macOS and Windows.
-          - platform: macos-latest
-            python-version: 3.7
           - platform: macos-latest
             python-version: 3.8
-          - platform: windows-latest
-            python-version: 3.7
           - platform: windows-latest
             python-version: 3.8
     steps:
@@ -49,4 +45,4 @@ jobs:
         file: coverage.xml
         flags: unittests
         name: codecov-umbrella
-        fail_ci_if_error: true
+        fail_ci_if_error: true

README.md

@@ -1,7 +1,7 @@
 [![Build Status](https://github.com/robotools/fontMath/workflows/Tests/badge.svg)](https://github.com/robotools/fontMath/actions?query=workflow%3ATests)
 [![codecov](https://codecov.io/gh/robotools/fontMath/branch/master/graph/badge.svg)](https://codecov.io/gh/robotools/fontMath)
 [![PyPI version fury.io](https://badge.fury.io/py/fontMath.svg)](https://pypi.org/project/fontMath/)
-![Python versions](https://img.shields.io/badge/python-3.6%2C%203.7%2C%203.8%2C%203.9-blue.svg)
+![Python versions](https://img.shields.io/badge/python-3.7%2C%203.8%2C%203.9-blue.svg)
 
 # fontMath
 A collection of objects that implement fast font, glyph, etc. math.

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py3{7,6,7,8,9}-cov, htmlcov
+envlist = py3{7,8,9}-cov, htmlcov
 skip_missing_interpreters = true
 
 [testenv]