Move internal modules to “internal” folder.

.internal/baseMatches.js

@@ -0,0 +1,20 @@
+import baseIsMatch from './.internal/baseIsMatch.js';
+import getMatchData from './.internal/getMatchData.js';
+import matchesStrictComparable from './.internal/matchesStrictComparable.js';
+
+/**
+ * The base implementation of `matches` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property values to match.
+ * @returns {Function} Returns the new spec function.
+ */
+function baseMatches(source) {
+  const matchData = getMatchData(source);
+  if (matchData.length == 1 && matchData[0][2]) {
+    return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+  }
+  return object => object === source || baseIsMatch(object, source, matchData);
+}
+
+export default baseMatches;