Drop CI settings for py35 and docutils-0.1[34]

.travis.yml

@@ -11,22 +11,19 @@ env:
 
 matrix:
   include:
-    - python: '3.5'
-      env:
-        - TOXENV=du12
     - python: '3.6'
       env:
-        - TOXENV=du13
+        - TOXENV=du14
     - python: '3.7'
       env:
-        - TOXENV=du14
+        - TOXENV=du15
     - python: '3.8'
       env:
-        - TOXENV=du15
+        - TOXENV=du16
         - PYTEST_ADDOPTS="--cov ./ --cov-append --cov-config setup.cfg"
     - python: 'nightly'
       env:
-        - TOXENV=du16
+        - TOXENV=py39
     - python: '3.6'
       env: TOXENV=docs
     - python: '3.6'

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 minversion = 2.4.0
-envlist = docs,flake8,mypy,coverage,py{35,36,37,38,39},du{12,13,14,15}
+envlist = docs,flake8,mypy,coverage,py{36,37,38,39},du{14,15,16}
 
 [testenv]
 usedevelop = True
@@ -14,12 +14,10 @@ passenv =
     EPUBCHECK_PATH
     TERM
 description =
-    py{35,36,37,38,39}: Run unit tests against {envname}.
+    py{36,37,38,39}: Run unit tests against {envname}.
     du{12,13,14}: Run unit tests with the given version of docutils.
 deps =
     git+https://github.com/html5lib/html5lib-python  # refs: https://github.com/html5lib/html5lib-python/issues/419
-    du12: docutils==0.12
-    du13: docutils==0.13.1
     du14: docutils==0.14
     du15: docutils==0.15
     du16: docutils==0.16