CI: clean up travis

- address warnings and deprecations
- move to 3.8-dev
- upgrade mypy so typed-ast doesn't break on 3.8
- remove OSX builds, no need in a pure-python package.

Author: mjpieters

.travis.yml

@@ -4,15 +4,14 @@ if: >  # Forbid running non-PR pushes from pyup bot
   not (type != pull_request AND branch =~ ^pyup\-scheduled\-update\-)
 
 dist: xenial
-sudo: required
 
 language: python
 
 python:
 - 3.5
 - 3.6
 - &mainstream_python 3.7
-- nightly
+- 3.8-dev
 - &pypy3 pypy3.5-6.0.0
 
 install:
@@ -51,33 +50,13 @@ _helpers:
     apt:
       packages:
       - libenchant-dev
-- &osx_python_base
-  stage: &stage_test_osx_name test under OS X (last chance to fail before deploy available)
-  os: osx
-  language: generic
-  python: *pypy3
-  env:
-  - &env_pypy3 PYTHON_VERSION=pypy3.6-7.1.1
-  - &env_pyenv PYENV_ROOT="$HOME/.pyenv"
-  - &env_path PATH="$PYENV_ROOT/bin:$PATH"
-  before_install:
-  - brew update
-  - brew install pyenv || brew upgrade pyenv
-  - &ensure_pyenv_preloaded |
-    eval "$(pyenv init -)"
-    eval "$(pyenv virtualenv-init -)"
-  - &install_python pyenv install --skip-existing --keep --verbose "$PYTHON_VERSION"
-  - &switch_python pyenv shell "$PYTHON_VERSION"
-  - &python_version python --version
-  before_cache:
-  - brew --cache
 
 os: linux
 
-jobs:
+matrix:
   fast_finish: true
   allow_failures:
-  - python: nightly
+  - python: 3.8-dev
 
   - <<: *_doc_base
     name: Checking docs spelling
@@ -120,37 +99,15 @@ jobs:
 
   - <<: *_lint_base
     name: Making sure that CONTRIBUTORS.txt remains sorted
-    language: minimal
+    language: shell
     install:
     - skip
     script:
     - LC_ALL=C sort -c CONTRIBUTORS.txt
 
-  - <<: *osx_python_base
-    python: 3.5.3
-    env:
-    - &env_py35 PYTHON_VERSION=3.5.3
-    - *env_pyenv
-    - *env_path
-  - <<: *osx_python_base
-    python: *mainstream_python
-    env:
-    - *env_py36
-    - *env_pyenv
-    - *env_path
-  - <<: *osx_python_base
-    python: 3.7
-    env:
-    - &env_py37 PYTHON_VERSION=3.7.0
-    - *env_pyenv
-    - *env_path
-  # pypy3.5-5.10.0 fails under OS X because it's unsupported
-
 stages:
 - *doc_stage_name
 - test
-- name: *stage_test_osx_name
-  if: type IN (api, cron)
 
 cache: pip
 

requirements/ci.txt

@@ -1,5 +1,5 @@
 setuptools-git==1.2
-mypy==0.670; implementation_name=="cpython"
+mypy==0.720; implementation_name=="cpython"
 mypy-extensions==0.4.1; implementation_name=="cpython"
 
 -r ci-wheel.txt