Acceptance Criteria

• Fix the BSONRegex constructor to alphabetize the options
• Investigate and fix the spec test that isn't catching this error

Original Description

The options in a BSONRegExp are supposed to be always alphabetized.
https://github.com/mongodb/js-bson/blob/master/src/regexp.ts#L40

There is a spec test we should be failing here: https://github.com/mongodb/specifications/blob/859af7b17a0c99bdd727ec11dd8733ac25da7398/source/bson-corpus/tests/regex.json#L33-L37