Add negative lookahead to tokenizer

[nachobibian]

Words that start with numbers (such as GUIDs) are not well processed by the tokenizer.

Furthermore the output of stringify is not understood by parse.

const str = stringify({
  op: "eq",
  attrPath: "064869bf-be25-466f-803d-004a0540574b",
  compValue: "bjensen"
})

console.log(parse(str)) // throws

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
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No Coverage information
No Duplication information

[sonarqubecloud]

Quality Gate passed

Kudos, no new issues were introduced!

0 New issues
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarCloud

[thomaspoignant]

Hey @nachobibian sorry for the time it took to review your PR.
Thanks a lot for your contribution, I will release a new version of the lib soon.