Add setEnvironment span option

Allows adding information to the span's environment -- currently,
the integration reports information to AppSignal about the browser
and the transport used. This might allow us to send other kinds of
information, such as which integration was used to report a given
error.

Author: unflxw

packages/javascript/src/span.ts

@@ -70,6 +70,11 @@ export class Span extends Serializable<JSSpanData> {
     return this
   }
 
+  public setEnvironment(environment: HashMap<string>): this {
+    this._data.environment = { ...this._data.environment, ...environment }
+    return this
+  }
+
   // @private
   // Do not use this function directly. Instead, set the `matchBacktracePaths`
   // configuration option when initializing AppSignal.

packages/types/src/interfaces/span.ts

@@ -18,6 +18,8 @@ export interface JSSpan {
   setParams(params: HashMap<any>): this
 
   setBreadcrumbs(breadcrumbs: Breadcrumb[]): this
+
+  setEnvironment(environment: HashMap<string>): this
 }
 
 /**