Bump patch version and add missed typing

Author: Christopher Pardy

package.json

@@ -1,6 +1,6 @@
 {
   "name": "json-rules-engine",
-  "version": "6.4.1",
+  "version": "6.4.2",
   "description": "Rules Engine expressed in simple json",
   "main": "dist/index.js",
   "types": "types/index.d.ts",

types/index.d.ts

@@ -1,6 +1,7 @@
 export interface EngineOptions {
   allowUndefinedFacts?: boolean;
   allowUndefinedConditions?: boolean;
+  replaceFactsInEventParams?: boolean;
   pathResolver?: PathResolver;
 }