travis: osx+win tests, sperate docs build

.travis.yml

@@ -2,20 +2,67 @@ language: python
 os: linux
 jobs:
   include:
+# docs build
+    - name: Docs (py36)
+      python: 3.6
+      install: make init
+      script: make docs
+      after_script: []
+# linux
     - python: 2.7
     - python: 3.4
     - python: 3.5
     - python: 3.6
     - python: 3.7
     - python: 3.8
-      os: linux
+# OSX
+    - name: OSX Python 2.7
+      os: osx
+      language: shell
+      before_install:
+        - cp -fv `which python2` `which python` || true
+        - cp -fv `which pip2` `which pip` || true
+        - pip install --upgrade pip
+      after_script: []
+    - name: OSX Python 3.7
+      os: osx
+      language: shell
+      before_install:
+        - cp -fv `which python3` `which python` || true
+        - cp -fv `which pip3` `which pip` || true
+        - pip install --upgrade pip
+      after_script: []
+# Windows
+    - name: Win Python 3.6
+      language: shell
+      os: windows
+      env: PATH=/c/Python36:/c/Python36/Scripts:$PATH
+      before_install:
+        - choco install python --version 3.6.8
+        - python -m pip install --upgrade pip
+      after_script: []
+    - name: Win Python 3.7
+      language: shell
+      os: windows
+      env: PATH=/c/Python37:/c/Python37/Scripts:$PATH
+      before_install:
+        - choco install python --version 3.7.4
+        - python -m pip install --upgrade pip
+      after_script: []
+    - name: Win Python 3.8
+      language: shell
+      os: windows
+      env: PATH=/c/Python38:/c/Python38/Scripts:$PATH
+      before_install:
+        - choco install python --version 3.8.2
+        - python -m pip install --upgrade pip
+      after_script: []
 install:
     - pip install -r requirements.txt
     - pip install coveralls
     - pip install scrutinizer-ocular
 script:
-    - make test
-    - make docs
+    - PYTHONHASHSEED=0 pytest --cov=steam tests
 after_script:
     - coveralls
     - ocular

Makefile

@@ -24,9 +24,12 @@ export HELPBODY
 help:
 	@echo "$$HELPBODY"
 
-init:
+init: init_docs
 	pip install -r requirements.txt
 
+init_docs:
+	pip install sphinx==1.8.5 sphinx_rtd_theme
+
 test:
 	coverage erase
 	PYTHONHASHSEED=0 pytest --cov=steam tests

requirements.txt

@@ -12,6 +12,4 @@ pytest-cov==2.5.1
 mock==1.3.0
 PyYAML==5.1
 vcrpy==2.0.1
-sphinx==1.8.5
-sphinx_rtd_theme
 cachetools>=3.0.0