chore(package): update compression to version 1.7.3

Closes #28

Author: greenkeeper[bot]

package.json

@@ -36,7 +36,7 @@
     "chai": "3.5.0",
     "chalk": "1.1.3",
     "cheerio": "0.22.0",
-    "compression": "1.6.2",
+    "compression": "1.7.3",
     "cross-env": "4.0.0",
     "css-loader": "^0.28.0",
     "eslint": "^3.19.0",