chore(coverage): Add coveralls to travis.yml

.travis.yml

@@ -39,16 +39,21 @@ before_install:
   - source .travis/setenv_lua.sh
 
 install:
+  - luarocks install luacov
+  - luarocks install luacov-coveralls
   - luarocks make rockspecs/sailor-current-1.rockspec
 
 before_script:
   - source .travis/setdatabases.sh
 
 script:
   - cd test/dev-app
-  - if [ "$SERVER" != "openresty" ]; then sailor test --verbose; fi
+  - if [ "$SERVER" != "openresty" ]; then sailor test --verbose --coverage; fi
   - if [ "$SERVER" == "openresty" ]; then sailor test --resty; fi
 
+after_success:
+  - luacov-coveralls -e $TRAVIS_BUILD_DIR/lua_install
+
 notifications:
   email:
     on_success: change