update travic and scrut confs

.scrutinizer.yml

@@ -6,7 +6,7 @@ filter:
 tools:
     external_code_coverage:
         timeout: 300
-        runs: 4
+        runs: 6
 
 build:
   nodes:

.travis.yml

@@ -1,18 +1,16 @@
 language: python
-cache: pip
-python:
-    - "2.7"
-    - "3.4"
-    - "3.5"
-    - "3.6"
+os: linux
 jobs:
   include:
+    - python: 2.7
+    - python: 3.4
+    - python: 3.5
+    - python: 3.6
     - python: 3.7
-      os: linux
     - python: 3.8
       os: linux
 install:
-    - make init
+    - pip install -r requirements.txt
     - pip install coveralls
     - pip install scrutinizer-ocular
 script: