Boundary condition checks and arguments check is missing

Hi, I found some test cases where the function is failing:

` reactStringReplace('Apt 111, phone number 555-5555-555.', (match, i) => (
console.log( ` ${match}`)
));`

so what I did I removed the second parameter and checked, so function is passed as matched and fn is passed as undefined. And got the below error:

F:\github\test1\react-string-replace\node_modules\react-string-replace\index.js:11
? string.replace(reRegExpChar, '\\$&')
^

TypeError: string.replace is not a function

So, I added some validation checks for the arguments so that instead of exiting with an error it provides the user with the warning message and exists swiftly.

PS F:\github\test1\react-string-replace> node app
Debugger attached.
Apt 111, phone number 555-5555-555.
function
undefined
Please check the function arguments, either the match or the function is missing
Waiting for the debugger to disconnect...

thanks,
Niki

Also, I have added the fix in my local system and wanted to check in with you