Fix travis build

.travis.yml

@@ -1,22 +1,31 @@
 sudo: false
 language: python
+git:
+  depth: 3
 python:
-  - "2.7"
-  - "3.4"
+  # First python version in this list is the default for matrix.include
+  # - "3.7"
+  - "3.6"
   - "3.5"
+  - "3.4"
+  - "2.7"
 env:
   matrix:
-  - EVM_EMACS=emacs-24.3-travis
-  - EVM_EMACS=emacs-24.4-travis
-  - EVM_EMACS=emacs-24.5-travis
+    - EVM_EMACS=emacs-26.1-travis
   global:
   # Turn on --use-mirrors option everywhere (even in tox):
   - PIP_USE_MIRRORS=t
   # Use Python version of the one used for running tox
   - TOXENV=py
 matrix:
-  allow_failures:
-    - python: "3.5"
+  include:
+    - env: EVM_EMACS=emacs-24.3-travis
+    - env: EVM_EMACS=emacs-24.4-travis
+    - env: EVM_EMACS=emacs-24.5-travis
+    - env: EVM_EMACS=emacs-25.1-travis
+    - env: EVM_EMACS=emacs-25.2-travis
+    - env: EVM_EMACS=emacs-25.3-travis
+
 before_install:
   - pip install -q virtualenv tox
   - curl -fsSkL https://gist.github.com/rejeep/ebcd57c3af83b049833b/raw > x.sh && source ./x.sh