Add newer python versions to travis

Author: AetherUnbound

.travis.yml

@@ -1,7 +1,9 @@
 language: python
 python:
-  - "2.7"
-  - "3.5"
+  - 2.7
+  - 3.5
+  - 3.6
+  - 3.7
 sudo: false
 notifications:
   email: false
@@ -18,7 +20,7 @@ deploy:
   user: mcquin
   password:
     secure: PrFX2wJrhchChzJD8DX+q7q9UK9zrxl0CN3AdT8kBEIAxzVpM+jCS0Znt7yPHipNjhhvCPtcP2HqmkKuV3o4EgGb/E7BORbKnvBmnLVPcAOpBJXSGxqSXctmPUDlV3FF6Vi2MSTzOIcAPBSqQEB9HBtEUYO34gu2R0dwC3LdrVM=
-  python: "2.7"
+  python: 2.7
   on:
     tags: true
     distributions: sdist bdist_wheel