move deps to devDeps

package.json

@@ -26,7 +26,6 @@
     "html-minifier": "^3.5.10",
     "mkdirp": "^0.5.1",
     "node-fetch": "^1.7.3",
-    "polka": "^0.3.4",
     "port-authority": "^1.0.2",
     "pretty-bytes": "^4.0.2",
     "pretty-ms": "^3.1.0",
@@ -35,7 +34,6 @@
     "sade": "^1.4.0",
     "sander": "^0.6.0",
     "source-map-support": "^0.5.3",
-    "tslib": "^1.9.0",
     "url-parse": "^1.2.0",
     "walk-sync": "^0.3.2",
     "webpack-format-messages": "^1.0.1"
@@ -52,6 +50,7 @@
     "mocha": "^4.0.1",
     "nightmare": "^2.10.0",
     "npm-run-all": "^4.1.2",
+    "polka": "^0.3.4",
     "rollup": "^0.56.5",
     "rollup-plugin-commonjs": "^8.3.0",
     "rollup-plugin-json": "^2.3.0",
@@ -60,6 +59,7 @@
     "serve-static": "^1.13.2",
     "svelte": "^1.49.1",
     "svelte-loader": "^2.3.2",
+    "tslib": "^1.9.0",
     "ts-node": "^4.1.0",
     "typescript": "^2.6.2",
     "webpack": "^4.1.0"