Add code coverage to CI (#97)

Author: sehrope

.gitignore

@@ -1 +1,3 @@
+coverage/
 node_modules
+.nyc_output/

.travis.yml

@@ -2,6 +2,8 @@ language: node_js
 node_js:
   - '4'
   - 'lts/*'
-  - 'node'
-env:
-  - PGUSER=postgres
+matrix:
+  include:
+    - name: 'Code Coverage'
+      node_js: 'stable'
+      script: 'npm run coverage-ci'

Makefile

@@ -1,11 +1,14 @@
-.PHONY: publish-patch test
+.PHONY: coverage minor patch test
 
 test:
 	npm test
 
 lint:
 	npm run lint
 
+coverage:
+	npm run coverage
+
 patch: test
 	npm version patch -m "Bump version"
 	git push origin master --tags