Move internal modules to “internal” folder.

.internal/baseConforms.js

@@ -0,0 +1,16 @@
+import baseConformsTo from './.internal/baseConformsTo.js';
+import keys from './keys.js';
+
+/**
+ * The base implementation of `conforms` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property predicates to conform to.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseConforms(source) {
+  const props = keys(source);
+  return object => baseConformsTo(object, source, props);
+}
+
+export default baseConforms;