fix(utils/camelToSnakeCase): better number handling

src/utils.js

@@ -60,7 +60,7 @@ export const streamToBuffer = getStream.buffer
 
 export function camelToSnakeCase (string) {
   return string.replace(
-    /([a-z])([A-Z])/g,
+    /([a-z0-9])([A-Z])/g,
     (_, prevChar, currChar) => `${prevChar}_${currChar.toLowerCase()}`
   )
 }

src/utils.spec.js

@@ -20,10 +20,12 @@ import {
 describe('camelToSnakeCase()', function () {
   it('converts a string from camelCase to snake_case', function () {
     expect(camelToSnakeCase('fooBar')).to.equal('foo_bar')
+    expect(camelToSnakeCase('ipv4Allowed')).to.equal('ipv4_allowed')
   })
 
   it('does not alter snake_case strings', function () {
     expect(camelToSnakeCase('foo_bar')).to.equal('foo_bar')
+    expect(camelToSnakeCase('ipv4_allowed')).to.equal('ipv4_allowed')
   })
 
   it('does not alter upper case letters expect those from the camelCase', function () {