Add Node v13 support

.travis.yml

@@ -1,5 +1,6 @@
 language: node_js
-node_js
+node_js:
+  - "13"
   - "12"
   - "11"
   - "10"
@@ -8,7 +9,6 @@ node_js
   - "7"
   - "6"
   - "4"
-  - "0.12"
   - "iojs"
 
 compiler: gcc
@@ -38,14 +38,23 @@ addons:
     packages:
       - gcc-4.7
       - g++-4.7
+      - gcc-4.9
+      - g++-4.9
 
 before_install:
   - npm config set python `which python`
   - if [ $TRAVIS_OS_NAME == "linux" ]; then
-      export CC="gcc-4.7";
-      export CXX="g++-4.7";
-      export LINK="gcc-4.7";
-      export LINKXX="g++-4.7";
+      if (( $(node -v | sed 's/v//' | sed 's/\..*$//') > 9 )); then
+        export CC="gcc-4.9";
+        export CXX="g++-4.9";
+        export LINK="gcc-4.9";
+        export LINKXX="g++-4.9";
+      else
+        export CC="gcc-4.7";
+        export CXX="g++-4.7";
+        export LINK="gcc-4.7";
+        export LINKXX="g++-4.7";
+      fi
     fi
   - nvm --version
   - node --version

package.json

@@ -35,7 +35,7 @@
     "get-stdin": "^4.0.1",
     "glob": "^7.0.3",
     "meow": "^3.7.0",
-    "node-sass": "4.12",
+    "node-sass": "4.13",
     "sass-graph": "^2.1.1",
     "stdout-stream": "^1.4.0"
   },