remove .travis.yml, fix MANIFEST.in

.travis.yml

@@ -1,37 +0,0 @@
-language: python
-
-cache:
-    directories:
-        - $HOME/.cache/pip
-
-os: linux
-
-matrix:
-    include:
-        - python: 3.5
-          dist: xenial
-          env: TOXENV=py35
-        - python: 3.6
-          dist: bionic
-          env: TOXENV=py36
-        - python: 3.7
-          dist: bionic
-          env: TOXENV=py37
-        - python: 3.8
-          dist: focal
-          env: TOXENV=py38
-        - python: 3.9
-          dist: focal
-          env: TOXENV=py39
-        - python: 3.8
-          dist: focal
-          env: TOXENV=flake8
-
-install:
-  - "pip install -r requirements.d/dev.txt"
-
-script:
-  - "tox"
-
-after_success:
-  - codecov -e TRAVIS_OS_NAME TOXENV

MANIFEST.in

@@ -1,4 +1,4 @@
 # stuff we need to include into the sdist is handled automatically by
 # setuptools_scm - it includes all git-committed files.
 # but we want to exclude some committed files/dirs not needed in the sdist:
-exclude .gitattributes .gitignore .travis.yml
+exclude .gitattributes .gitignore .github