Update and fix test python versions and matrix

Author: benmurden

.travis.yml

@@ -25,18 +25,22 @@ matrix:
     include:
       - python: "3.7"
         dist: xenial
-        env:
-            - DJANGO=2.0
-            - DJANGO=2.1
+        env: DJANGO=2.0
+      - python: "3.7"
+        dist: xenial
+        env: DJANGO=2.1
+
       - python: "3.4"
-        env:
-            - DJANGO=1.11
-            - DJANGO=2.0
-      - python: "2.7"
-        env:
-            - TOXENV="flake8"
-            - DJANGO=1.11
+        env: DJANGO=1.11
+      - python: "3.4"
+        env: DJANGO=2.0
+
       - python: "2.7"
+        env: DJANGO=1.11
+
+      - python: "3.7"
+        env: TOXENV="flake8"
+      - python: "3.7"
         env: TOXENV="isort"
 
 install:

tox.ini

@@ -39,14 +39,14 @@ deps =
 
 
 [testenv:flake8]
-basepython = python2.7
+basepython = python3.7
 deps =
     flake8
 commands=
     flake8 intl_tel_input testapp
 
 [testenv:isort]
-basepython = python2.7
+basepython = python3.7
 deps =
     isort
 commands=