build: modernize tooling

Migrate out of Grunt:
* Updating contributors to the ad-hoc script (added in this commit).
* Creating the changelog to the Semantic Release plugin.
* Releasing to GitHub to the Semantic Release plugin.
* Bumping the version to Semantic Release.
* Running e2e tests to the package.json scripts. Also, update the Karma conf
file to be compatible with this.
* Linting (with eslint) to the package.json scripts. Also, configure the Jasmine
env in the eslint conf file in the unit tests.
* The "Release" lifecycle step to the package.json scripts.

gruntfile.js

@@ -1,83 +1,10 @@
+// Do not add new tasks. Grunt is used only for building and will be replaced.
 module.exports = function (grunt) {
   grunt.loadTasks('tasks')
   grunt.initConfig({
     pkgFile: 'package.json',
     build: {
       adapter: ['src/adapter.js']
-    },
-    'npm-contributors': {
-      options: {
-        commitMessage: 'chore: update contributors'
-      }
-    },
-    conventionalChangelog: {
-      release: {
-        options: {
-          changelogOpts: {
-            preset: 'angular'
-          }
-        },
-        src: 'CHANGELOG.md'
-      }
-    },
-    conventionalGithubReleaser: {
-      release: {
-        options: {
-          auth: {
-            type: 'oauth',
-            token: process.env.GH_TOKEN
-          },
-          changelogOpts: {
-            preset: 'angular'
-          }
-        }
-      }
-    },
-    bump: {
-      options: {
-        commitMessage: 'chore: release v%VERSION%',
-        pushTo: 'upstream',
-        commitFiles: [
-          'package.json',
-          'CHANGELOG.md'
-        ]
-      }
-    },
-    karma: {
-      adapter: {
-        configFile: 'karma.conf.js',
-        autoWatch: false,
-        singleRun: true,
-        reporters: ['dots']
-      }
-    },
-    eslint: {
-      target: [
-        'src/adapter.js',
-        'lib/boot.js',
-        'lib/index.js',
-        'gruntfile.js',
-        'karma.conf.js',
-        'test/*.js',
-        'tasks/*.js'
-      ]
     }
   })
-
-  require('load-grunt-tasks')(grunt)
-
-  grunt.registerTask('test', ['build', 'karma'])
-  grunt.registerTask('default', ['eslint', 'test'])
-
-  grunt.registerTask('release', 'Bump the version and publish to NPM.', function (type) {
-    grunt.task.run([
-      'build',
-      'npm-contributors',
-      'bump:' + (type || 'patch') + ':bump-only',
-      'conventionalChangelog',
-      'bump-commit',
-      'conventionalGithubReleaser',
-      'npm-publish'
-    ])
-  })
 }

karma.conf.js

@@ -1,7 +1,7 @@
 module.exports = function (config) {
   config.set({
     frameworks: ['jasmine'],
-    reporters: ['karma-jasmine'],
+    reporters: ['karma-jasmine', 'dots'],
 
     files: [
       'src/*.js',
@@ -10,7 +10,7 @@ module.exports = function (config) {
 
     browsers: ['FirefoxHeadless'],
 
-    autoWatch: true,
+    singleRun: true,
 
     plugins: [
       'karma-firefox-launcher',