Merge 4292b87 into 873f460

.gitignore

@@ -1,3 +1,6 @@
 node_modules
 coverage
-.idea
+.idea
+
+package-lock.json
+yarn.lock

.npmrc

@@ -0,0 +1 @@
+package-lock=false

.travis.yml

@@ -11,17 +11,37 @@ cache:
 # - https://github.com/hexojs/hexo/blob/master/.travis.yml
 # - https://github.com/sass/node-sass/blob/master/.travis.yml
 node_js:
-  - "4"
   - "6"
+  - "8"
+  - "10"
   - "node"
-env:
-- CXX=g++-4.8
+
 addons:
   apt:
     sources:
-    - ubuntu-toolchain-r-test
+      - ubuntu-toolchain-r-test
     packages:
-    - g++-4.8
+      - gcc-4.7
+      - g++-4.7
+      - gcc-4.9
+      - g++-4.9
+
+# https://github.com/sass/node-sass/blob/0c31dc2/.travis.yml#L73-L88
+before_install:
+  - npm config set python `which python`
+  - if [ $TRAVIS_OS_NAME == "linux" ]; then
+      if [[ $(node -v) =~ v1[01] ]]; 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
 
 script:
   - npm run lint

package.json

@@ -21,7 +21,7 @@
     "test-cov": "istanbul cover --print both _mocha -- test/index.js"
   },
   "engines": {
-    "node": ">= 4"
+    "node": ">= 6"
   },
   "dependencies": {
     "node-sass": "^4.5.3"