Adds packages for code sniffer and code coverage reporting.

Author: dsposito

composer.json

@@ -17,7 +17,9 @@
         "dayrev/smmry-sdk-php": "^1.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^5.7"
+        "phpunit/phpunit": "^5.7",
+        "satooshi/php-coveralls": "^1.0",
+        "squizlabs/php_codesniffer": "^2.8"
     },
     "autoload": {
         "psr-4": {"DayRev\\Summarizer\\": "src/"}