Clean up and update to latest contrib (#58)

* Add package lock

* Clean up and update to latest contrib

.travis.yml

@@ -1,5 +1,3 @@
-sudo: false
-
 language: node_js
 
 node_js:
@@ -10,6 +8,4 @@ node_js:
 matrix:
   fast_finish: true
 
-cache:
-  directories:
-    - node_modules
+cache: npm

CONTRIBUTING.md

@@ -1 +1 @@
-Please see the [Contributing to grunt](http://gruntjs.com/contributing) guide for information on contributing to this project.
+Please see the [Contributing to grunt](https://gruntjs.com/contributing) guide for information on contributing to this project.

README.md

@@ -6,7 +6,7 @@
 
 ## Getting Started
 
-If you haven't used [Grunt](http://gruntjs.com/) before, be sure to check out the [Getting Started](http://gruntjs.com/getting-started) guide, as it explains how to create a [Gruntfile](http://gruntjs.com/sample-gruntfile) as well as install and use Grunt plugins. Once you're familiar with that process, you may install this plugin with this command:
+If you haven't used [Grunt](https://gruntjs.com/) before, be sure to check out the [Getting Started](https://gruntjs.com/getting-started) guide, as it explains how to create a [Gruntfile](https://gruntjs.com/sample-gruntfile) as well as install and use Grunt plugins. Once you're familiar with that process, you may install this plugin with this command:
 
 ```shell
 npm install grunt-contrib-nodeunit --save-dev
@@ -143,4 +143,4 @@ grunt.initConfig({
 
 Task submitted by ["Cowboy" Ben Alman](http://benalman.com)
 
-*This file was generated on Sat May 19 2018 15:46:13.*
+*This file was generated on Mon Feb 10 2020 13:20:25.*

appveyor.yml

@@ -1,31 +1,34 @@
-clone_depth: 10
+clone_depth: 5
 
 version: "{build}"
 
-# What combinations to test
 environment:
   matrix:
-    - nodejs_version: "8"
-      platform: x86
-    - nodejs_version: "10"
-      platform: x86
+    - NODEJS_VERSION: "8"
+      PLATFORM: x86
+    - NODEJS_VERSION: "8"
+      PLATFORM: x64
+    - NODEJS_VERSION: "10"
+      PLATFORM: x64
+    - NODEJS_VERSION: "12"
+      PLATFORM: x64
 
 install:
-  - ps: Install-Product node $env:nodejs_version $env:platform
-  - npm install
+  - ps: Install-Product node $env:NODEJS_VERSION $env:PLATFORM
+  - npm ci
 
 test_script:
-  # Output useful info for debugging
-  - node --version && npm --version
+  - node --version
+  - npm --version
   # We test multiple Windows shells because of prior stdout buffering issues
   # filed against Grunt. https://github.com/joyent/node/issues/3584
   - ps: "npm test # PowerShell" # Pass comment to PS for easier debugging
-  - cmd: npm test
+  - npm test
 
 build: off
 
 matrix:
   fast_finish: true
 
 cache:
-  - node_modules -> package.json
+  - '%APPDATA%\npm-cache\ -> appveyor.yml,package.json,package-lock.json'