Bug in public updateToken

[ticxx]

Hello,

updateToken throw always an error ,
due to a typo in keycloak.core.service.js line 68

angular2-keycloak/src/services/keycloak.core.service.ts

Line 138 in 4185e47

'Basic ' + btoa(this.clientId + ': ' + this.clientSecret)

headers.append('Authorization', 'Basic ' + btoa(_this.clientId + ': ' + _this.clientSecret));
should be (no space after the colon)
headers.append('Authorization', 'Basic ' + btoa(_this.clientId + ':' + _this.clientSecret));

regards, ticxx