[Bug] Integrated lexer fails to properly handle 'abstract' + 'async ' typescript keyword.

[jerome-benoit]

trafficstars

Unexpected token, expected "(" (/Users/fraggle/Sources/ev-server-git/src/client/ocpi/OCPIClient.ts:291:17)

289 |   }
290 | 
> 291 |   async abstract triggerJobs(): Promise<{ tokens: OCPIJobResult; locations: OCPIJobResult; sessions: OCPIJobResult; cdrs: OCPIJobResult }>;
    |                 ^
292 | }
293 |