Fix undefined argument regression in setUserId and setOptOutCookie (close #991)

Author: Paul Boocock

common/changes/@snowplow/browser-tracker-core/release-3.1.2_2021-08-14-18-44.json

@@ -0,0 +1,10 @@
+{
+  "changes": [
+    {
+      "packageName": "@snowplow/browser-tracker-core",
+      "comment": "Fix undefined argument regression in setUserId and setOptOutCookie (#991)",
+      "type": "none"
+    }
+  ],
+  "packageName": "@snowplow/browser-tracker-core"
+}

common/changes/@snowplow/browser-tracker/release-3.1.2_2021-08-14-18-44.json

@@ -0,0 +1,10 @@
+{
+  "changes": [
+    {
+      "packageName": "@snowplow/browser-tracker",
+      "comment": "Fix undefined argument regression in setUserId and setOptOutCookie (#991)",
+      "type": "none"
+    }
+  ],
+  "packageName": "@snowplow/browser-tracker"
+}

common/changes/@snowplow/javascript-tracker/release-3.1.2_2021-08-14-18-44.json

@@ -0,0 +1,10 @@
+{
+  "changes": [
+    {
+      "packageName": "@snowplow/javascript-tracker",
+      "comment": "Fix undefined argument regression in setUserId and setOptOutCookie (#991)",
+      "type": "none"
+    }
+  ],
+  "packageName": "@snowplow/javascript-tracker"
+}