chore: update travis and appveyor

.appveyor.yml

@@ -7,13 +7,13 @@
 # What combinations to test
 environment:
   matrix:
-    - nodejs_version: "4"
+    - nodejs_version: "6"
       platform: x64
-    - nodejs_version: "4"
-      platform: x86
     - nodejs_version: "6"
+      platform: x86
+    - nodejs_version: "8"
       platform: x64
-    - nodejs_version: "7"
+    - nodejs_version: "10"
       platform: x64
 
 install:
@@ -24,10 +24,7 @@ install:
   # install node
   # Get the latest stable version of Node.js or io.js
   - ps: Install-Product node $env:nodejs_version
-  - ps: >-
-      if ($env:nodejs_version -eq "0.12" -or $env:nodejs_version -eq "0.10") {
-        $env:PATH="$env:APPDATA\npm;$env:PATH"
-      }
+
   # install grunt-cli globally
   - npm install -g grunt-cli
   # install modules
@@ -36,14 +33,6 @@ install:
 test_script:
   # Output useful info for debugging
   - node --version && npm --version
-  - ps: >-
-      if ($env:nodejs_version -eq "0.12" -or $env:nodejs_version -eq "0.10") {
-        echo ----- Running tests in LEGACY mode -----
-        grunt test-old
-      } else {
-        echo ----- Running tests in NORMAL mode -----
-        grunt test
-      }
 
 # Don't actually build.
 build: off

.travis.yml

@@ -1,11 +1,10 @@
 language: node_js
 node_js:
-  - "4"
   - "6"
-  - "7"
+  - "8"
+  - "10"
 
 before_install:
-  - 'if [ "$TRAVIS_NODE_VERSION" != "0.10" -a "$TRAVIS_NODE_VERSION" != "0.12" ]; then npm update npm -g; fi'
   - npm install -g grunt-cli
 
 #travis build  speed up