Fix svg2png in tests, update node deps

.travis.yml

@@ -1,6 +1,7 @@
 language: node_js
 node_js:
   - "4"
+  - "node"
 sudo: false
 before_install:
  - export WAPPALYZER_ROOT=$TRAVIS_BUILD_DIR

bin/wappalyzer-build

@@ -42,7 +42,7 @@ do
 	dest="$WAPPALYZER_ROOT/src/icons/converted/$(basename "$svg").png"
 
 	if [[ ! -f "$dest" ]]; then
-		svg2png "$svg" --width=32 --height=32 --output "$dest" || true
+		node $WAPPALYZER_NODE_PATH/node_modules/svg2png/bin/svg2png-cli "$svg" --width=32 --height=32 --output "$dest" || true
 	fi
 done
 

docker/Dockerfile

@@ -39,7 +39,6 @@ RUN su wappalyzer -c "mkdir $WAPPALYZER_NODE_PATH"
 
 ADD node/package.json $WAPPALYZER_NODE_PATH/package.json
 
-RUN npm i -g npm svg2png --prefix=/usr/local
 RUN ln -s -f /usr/local/bin/npm /usr/bin/npm
 RUN su wappalyzer -c "cd $WAPPALYZER_NODE_PATH && npm i"
 

docker/node/package.json

@@ -12,13 +12,14 @@
     "test": "./bin/wappalyzer build"
   },
   "devDependencies": {
-    "file-type": "3.4.*",
-	"is-svg": "1.1.*",
-    "read-chunk": "1.0.*",
+    "file-type": "3.8.*",
+    "is-svg": "2.0.*",
+    "read-chunk": "2.0.*",
     "jsonlint": "*",
     "jpm": "*",
     "imagemin-cli": "*",
     "phantomjs-prebuilt": "*",
+    "svg2png": "*",
     "svgo": "*"
   },
   "engines": {