feat(eslint-config): resolve extended linting configurations

packages/eslint-config/index.js

@@ -1,5 +1,8 @@
 module.exports = {
-  extends: ['eslint-config-airbnb-base', 'plugin:wc/best-practice'],
+  extends: [
+    require.resolve('eslint-config-airbnb-base'),
+    require.resolve('./src/eslint-plugin-wc-export'),
+  ],
   parser: 'babel-eslint',
   env: {
     browser: true,

packages/eslint-config/src/eslint-plugin-wc-export.js

@@ -0,0 +1,7 @@
+/**
+ * Eslint doesn't understand the default export pattern from eslint the plugin, so we
+ * re-export the default export here.
+ */
+const eslintPluginWc = require('eslint-plugin-wc/lib/configs/best-practice').default;
+
+module.exports = eslintPluginWc;