travis: windows: use python 3.7.5

Author: efiop

scripts/ci/before_install.sh

@@ -48,7 +48,7 @@ if [[ "$TRAVIS_OS_NAME" == "windows" ]]; then
         choco install python2
         echo 'PATH="/c/Python27:/c/Python27/Scripts:$PATH"' >> env.sh
     else
-        choco install python --version 3.7.4
+        choco install python --version 3.7.5
         echo 'PATH="/c/Python37:/c/Python37/Scripts:$PATH"' >> env.sh
     fi
 elif [[ "$TRAVIS_OS_NAME" == "osx" ]]; then