- Linting: Use ESLint 7 new processor API as now targeted by eslint-plugin-markdown and eslint-plugin-jsdoc

- npm: Update devDeps.

Author: brettz9

.eslintrc.js

@@ -29,6 +29,10 @@ module.exports = {
     },
     {
       files: ['**/*.md'],
+      processor: 'markdown/markdown'
+    },
+    {
+      files: '**/*.md/*.js',
       rules: {
         'eol-last': 'off',
         'no-console': 'off',