Merge branch 'master' into feature/rrggbbaa

* master: (26 commits)
  Fix output quoting.
  Rework the README to allow the examples to be validated.
  New build
  Fix rollup config
  Switch from rollup-plugin-commonjs to @rollup/plugin-commonjs
  Replace uglify-js with rollup-plugin-terser, update rollup, simplify build setup
  Test on more node.js versions, lint and build on 14.
  Avoid no-prototype-builtins error
  eslint --fix . && prettier --write '**/*.js'
  Replace jshint with eslint
  prettier --write '**/*.{js,md}'
  Add prettier setup
  Try building on node.js 12 always, and only run the tests on the Travis-provided one
  Rename travis script to ci
  Drop package-lock.json, disable save-exact in .npmrc
  Bump lodash from 4.17.11 to 4.17.19
  Make npm build script possible to run on windows. refs #42 (comment)
  3.1.0
  Add luminance, contrast and darkness values
  Update author's email
  ...

.editorconfig

@@ -16,7 +16,7 @@ insert_final_newline = true
 
 ; Indentation
 indent_style = space
-indent_size = 4
+indent_size = 2
 
 [Makefile]
 indent_style = tab

.eslintignore

@@ -0,0 +1,6 @@
+/node_modules/
+/demo/
+/slides/
+/one-color-all.js
+/one-color.js
+/coverage/

.eslintrc

@@ -0,0 +1,12 @@
+{
+  "extends": ["standard", "prettier", "prettier/standard"],
+  "plugins": ["import", "mocha"],
+  "env": {
+    "mocha": true
+  },
+  "rules": {
+    "mocha/no-exclusive-tests": "error",
+    "mocha/no-nested-tests": "error",
+    "mocha/no-identical-title": "error"
+  }
+}

.npmrc

@@ -1 +1 @@
-save-exact=true
+package-lock = false

.prettierignore

@@ -0,0 +1,6 @@
+/node_modules/
+/demo/
+/slides/
+/one-color-all.js
+/one-color.js
+/coverage/

.prettierrc

@@ -0,0 +1,3 @@
+{
+  "singleQuote": true
+}

.travis.yml

@@ -3,14 +3,28 @@ services:
 language: node_js
 cache:
   directories:
-  - node_modules
+    - node_modules
 node_js:
-  - "0.10"
-  - "0.12"
-  - "1"
-  - "2"
-  - "3"
-  - "4"
+  - '0.12'
+  - '1'
+  - '2'
+  - '3'
+  - '4'
+  - '6'
+  - '8'
+  - '10'
+  - '12'
+  - '14'
+  - node
 
-script: "npm run-script travis"
-after_success: "<coverage/lcov.info ./node_modules/coveralls/bin/coveralls.js"
+matrix:
+  include:
+    - name: Lint
+      node_js: 14
+      script: npm run lint
+    - name: Documentation
+      node_js: 14
+      script: npm run test:documentation
+
+script: '(nvm i 14 && npm run build) && npm run ci:test'
+after_success: '<coverage/lcov.info ./node_modules/coveralls/bin/coveralls.js'