Add supporting themes required for Lotusdocs

themes/twbs/bootstrap/.babelrc.js

@@ -0,0 +1,12 @@
+module.exports = {
+  presets: [
+    [
+      '@babel/preset-env',
+      {
+        loose: true,
+        bugfixes: true,
+        modules: false
+      }
+    ]
+  ]
+};