Special characters in select keys throw in 3.0.0, was fine in 2.1.x and before

[jcestibariz]

Which package? intl-messageformat-parser

Describe the bug If a key in a select block contains special characters, like - or /, parse throws SyntaxError: Expected argName but "/" found.

To Reproduce Steps to reproduce the behavior:

1. Run this in node:

   const parser = require('intl-messageformat-parser');
   parser.parse('{x, select, /a-key {Result}}');

2. With intl-messageformat-parser@2.1.3 and below it passes
3. With intl-messageformat-parser@3.0.0 and above it fails

Expected behavior The message should be parsed without errors.

[longlho]

Yeah this is intentional since our parser behaves more closely with ICU messageformat spec now (which excludes special char from placeholder)