Add CryptoHandler to public api.

Author: Chris3773

projects/lib/src/public_api.ts

@@ -1,5 +1,6 @@
 export * from './angular-oauth-oidic.module';
 export * from './oauth-service';
+export * from './token-validation/crypto-handler';
 export * from './token-validation/jwks-validation-handler';
 export * from './token-validation/null-validation-handler';
 export * from './token-validation/validation-handler';