ini file parsing considers all values as strings

[dsherret]

Describe the bug

Steps to Reproduce

> import { parse } from "jsr:@std/ini"
undefined
> parse("value=undefined")
{ value: "undefined" }
> parse("value=null")
{ value: "null" }
> parse("value=true")
{ value: "true" }
> parse("value=false")
{ value: "false" }
> parse("value=123")
{ value: "123" }

Expected behavior

Should understand booleans, undefined, null, and numbers.

Environment

• OS: [e.g. Ubuntu 20.04, MacOS 11]
• deno version:
• std version: 0.224.0

[kt3k]

Looks like supporting boolean, number, string is common among parsers https://en.wikipedia.org/wiki/INI_file#Comparison_of_INI_parsers