fix travis build (unsupported pythons and pypy versions), update 3.10 in GH actions

.github/workflows/main.yml

@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        python-version: [2.7, 3.5, 3.6, 3.7, 3.8, 3.9, '3.10.0-alpha.5', pypy2, pypy3]
+        python-version: [2.7, 3.5, 3.6, 3.7, 3.8, 3.9, '3.10.0-beta.1', pypy2, pypy3]
       fail-fast: false
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:

.travis.yml

@@ -10,16 +10,8 @@ dist: xenial
 matrix:
   fast_finish: true
   include:
-  - python: 2.6
-    dist: trusty   # required for Python 2.6
   - python: 2.7
-    dist: trusty   # required for packages like gamin
+  #- python: pypy
-    name: 2.7 (trusty)
-  - python: 2.7
-    name: 2.7 (xenial)
-  - python: pypy
-  - python: 3.3
-    dist: trusty
   - python:  3.4
   - python:  3.5
   - python:  3.6