README.MD type fix

splitStringsChunkLength must be a number

README.md

@@ -904,7 +904,7 @@ Performance will 50-100% slower than without obfuscation
     selfDefending: true,
     shuffleStringArray: true,
     splitStrings: true,
-    splitStringsChunkLength: '5',
+    splitStringsChunkLength: 5,
     stringArray: true,
     stringArrayEncoding: 'rc4',
     stringArrayThreshold: 1,
@@ -934,7 +934,7 @@ Performance will 30-35% slower than without obfuscation
     selfDefending: true,
     shuffleStringArray: true,
     splitStrings: true,
-    splitStringsChunkLength: '10',
+    splitStringsChunkLength: 10,
     stringArray: true,
     stringArrayEncoding: 'base64',
     stringArrayThreshold: 0.75,