Update .travis.yml

Author: mpourmpoulis

.travis.yml

@@ -4,11 +4,11 @@ jobs:
     - name: "Windows Lint"
       os: windows
       language: sh
-      python: "3.3"
+      python: "3.7"
       cache: pip
       before_install:
-        - choco install python --version 3.3.5
-        - export PATH="/c/Python33:/c/Python33/Scripts:$PATH"
-        - python -m pip install --upgrade pip wheel
+        - choco install python --version 3.7.3
+        - export PATH="/c/Python37:/c/Python37/Scripts:$PATH"
+        - pip install pylint
       script:
-        - pylint library && pylint queries && pylint applications && pylint interface
+        - pylint library && pylint queries && pylint application && pylint interface