Return roman numerals as lowercase strings

README.md

@@ -2,7 +2,7 @@
 
 This package was adapted from [romannumeral](https://github.com/brandenc40/romannumeral) to fit my specific minimal use-case.
 
-All functionality except for the ability to convert integers to roman numerals has been removed.
+All functionality except for the ability to convert integers to **lowercase** roman numerals has been removed.
 
 If you need any additional functionality or further documentation, please see the original package.
 
@@ -13,9 +13,9 @@ goos: linux
 goarch: amd64
 pkg: github.com/rwinkhart/convertroman
 cpu: AMD Ryzen 9 3900X 12-Core Processor
-BenchmarkFromInt-24    	62046414	        21.08 ns/op	       0 B/op	       0 allocs/op
+BenchmarkFromInt-24    	61993154	        20.82 ns/op	       0 B/op	       0 allocs/op
 PASS
-ok  	github.com/rwinkhart/convertroman	1.332s
+ok  	github.com/rwinkhart/convertroman	1.827s
 ```
 
 ### Example
@@ -29,9 +29,9 @@ import (
 )
 
 func ExampleFromInt() {
-	roman, err := rom.FromInt(4)
-	if err != nil {
-		panic(err)
+	roman := FromInt(4)
+	if roman == "OOB" {
+		panic("Input integer is out of bounds")
 	}
 	fmt.Println(roman == "IV") // True
 }