Use build stages

.travis.yml

@@ -1,14 +1,19 @@
 language: python
 matrix:
   include:
-    - python: "2.7"
-    - python: "3.5"
-    - python: "3.6"
-    - python: "3.7"
+    - name "Testing with python 2.7"
+      python: "2.7"
+    - name "Testing with python 3.4"
+      python: "3.4"
+      dist: trusty
+    - name "Testing with python 3.5"
+      python: "3.5"
+    - name "Testing with python 3.6"
+      python: "3.6"
+    - name "Testing with python 3.7"
+      python: "3.7"
       dist: xenial
       sudo: true
-    - python: "3.4"
-      dist: trusty
 install:
 - pip install -U pip setuptools wheel
 - pip install -r requirements.txt
@@ -22,3 +27,8 @@ deploy:
     secure: AeTh3w8QeXQ6StzHlIbQcYZnr1qRjkQ4lBV0zup1t43dXxoRaXbQ7x2ZwcYpbM2h/lWeWssU2G6iY5ZW4a2t0+4go3PMPLSo2AC/sNJyVeuxvefkXTlWsL2YkTitpB1hhEzBVLMczNgf2OpLrmJIS/3hh1p3smiyj2xt1Jf7TaQ3bGneVFmlFrbOQTz5caoqjTRkhDWEa38pnSpbNIlgHIwhuDpVfUZn+Gh/UXmWdgiE1srpI1YLEMjpiFTe39Y36XvaJ/xszd/a929YgOalTZws+8iCzvI+/vSKdf1G+Phc4iVRbqwHAc4lfzbl42Yy81IMBrCMia/uum/lgkxZtcMJzyBwDXA0Rxtp1Ayh27bwI02tdJ3VQ8X8zvDJjATQhL2dRA5jqjNTco3SugM5rGcOvuLyjgROI9hQV0PSOXydqA/5kfLir5Y0cEpn5xW/RRVW5xgG9Pl6SzpS5vyd4/FB02wnp4pSxJM3v8WOUvMgKK4XjmMKKE8+IrY+avLLrhg3y3ziHdtjrnsVjo+fX+pdxymy85cNDVVH+AfBhG+Hnf2svxA4HnKzN9QaTGLB7EjU8TYCa1eJ8djSbEF9MStw2+b3cUG65jvWjDt/sPwzmcsrAob4rcy5pIBQbbtAa48lqighjjpM8EkDepLJaduDYUIbf3K+dKNjsKBXAo4=
   on:
     tags: true
+
+stages:
+  - test
+  - name: deploy
+    if: branch = master AND tag IS present