travis setup update after merge: start ganache before running the tests

Author: Chris Hatch

.gitignore

@@ -1,4 +1,3 @@
 abi/
 build/
 node_modules/
-package-lock.json

.travis.yml

@@ -3,10 +3,11 @@ language: node_js
 node_js:
   - node
   - lts/*
-  - 10
-  - 8
 cache:
   directories:
     - node_modules
 script:
+script:
+  - npm run ganache-start > /dev/null &
+  - sleep 5
   - npm test