Fix issue where setSlashApiKey would break if no headers was set.

Sydney-o9 · Sydney-o9 · commit 2f720a1f40e2 · 2020-11-03T00:39:27.000+11:00
diff --git a/src/clientStub.ts b/src/clientStub.ts
@@ -377,6 +377,7 @@ export class DgraphClientStub {
     }
 
     public setSlashApiKey(apiKey: string) {
+        this.options.headers === undefined && (this.options.headers = {});
         this.options.headers[SLASH_API_KEY_HEADER] = apiKey;
     }
 

Original file line number	Diff line number	Diff line change
`@@ -377,6 +377,7 @@ export class DgraphClientStub {`
`377`	`377`	`}`
`378`	`378`
`379`	`379`	`public setSlashApiKey(apiKey: string) {`
	`380`	`+ this.options.headers === undefined && (this.options.headers = {});`
`380`	`381`	`this.options.headers[SLASH_API_KEY_HEADER] = apiKey;`
`381`	`382`	`}`
`382`	`383`