fix: Removed the unused doUnesc param in the unsafe function (#243)

The function `unsafe` have a parameter that is not used anywhere :
`doUnesc`.
In this PR, this parameter is removed, also making the function
declaration syntaxically closer to `safe`.

Before : 
`const unsafe = (val, doUnesc) => {`

Now :
`const unsafe = val => {`

lib/ini.js

@@ -225,7 +225,7 @@ const safe = val => {
   return val.split(';').join('\\;').split('#').join('\\#')
 }
 
-const unsafe = (val, doUnesc) => {
+const unsafe = val => {
   val = (val || '').trim()
   if (isQuoted(val)) {
     // remove the single quotes before calling JSON.parse