Validation of Guids

[manni497]

There is an issue while validating Guids automatically generated by EF.

The 'uuid' library is validation guid with following regular expression(https://github.com/uuidjs/uuid/blob/a505f01e59d8a5e432ab3355c5522bea055a8c27/src/regex.ts)

/^(?:[0-9a-f]{8}-[0-9a-f]{4}-[1-8][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$/i

The highlighted part of regular expression returns false trying to validate this Guid f094d99a-347e-4fe5-eea2-08dbc5deb2a0
Should not be instead [0-9a-f] ?

[drebrez]

Solved in #67