message: validation in addParams()
diff: @@ -86,8 +86,10 @@ export abstract class RavenCommand {
  }
  protected addParams(params: object | string, value?: any): void {
  - Object.assign(this.params, TypeUtil.isObject(params)
  - ? params : {[params as string]: value});
  + if (!TypeUtil.isNull(params)) {
  + Object.assign(this.params, TypeUtil.isString(params)
  + ? {[params as string]: value} : <object>params || {});
  + }
  }
  protected removeParams(params: string[] | string, ...otherParams: string[]) {
  