first commit

node-course/node_modules/mdn-data/css/index.js

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+module.exports = {
+  atRules:    require('./at-rules'),
+  functions:  require('./functions'),
+  selectors:  require('./selectors'),
+  types:      require('./types'),
+  properties: require('./properties'),
+  syntaxes:   require('./syntaxes'),
+  units:      require('./units'),
+}