Clean up root of project directory

Problem: Project root has a handful of files that aren't used at all or
could be placed elsewhere.

Solution: Delete unused files and move the changelog to the
documentation directory with the other Markdown files (other than the
readme, of course).

.eslintrc.js

@@ -1,16 +0,0 @@
-module.exports = {
-  env: {
-    commonjs: true,
-    es6: true,
-    node: true,
-  },
-  extends: "eslint:recommended",
-  globals: {
-    Atomics: "readonly",
-    SharedArrayBuffer: "readonly",
-  },
-  parserOptions: {
-    ecmaVersion: 2018,
-  },
-  rules: {},
-};

.npmignore

@@ -1,3 +0,0 @@
-.*
-docs
-*.tgz

.stylelintrc

@@ -1,3 +0,0 @@
-{
-  "extends": "stylelint-config-recommended"
-}

package.json

@@ -18,7 +18,7 @@
     "start": "node src/index.js",
     "test": "common-good check --dependency-check-suffix '-i changelog-version -i mkdirp -i nodemon -i stylelint-config-recommended'",
     "preversion": "npm test",
-    "version": "changelog-version && git add CHANGELOG.md"
+    "version": "mv docs/CHANGELOG.md ./ && changelog-version && mv CHANGELOG.md docs/ && git add CHANGELOG.md"
   },
   "dependencies": {
     "@fraction/base16-css": "^1.1.0",