testing JS callout on Edge and X

[danistrebel]

Description

What's changed, or what was fixed?

• New Tests

Fixes: #559

Housekeeping

(please check all that apply [x], do not edit the text)

• [x] I have run all the tests locally and they all pass.
• [x] I have followed the relevant style guide for my changes.
• [ ] PR requires full pipeline run (Run for changes only by default).

CC: @apigee-devrel-reviewers

[danistrebel]

/gcbrun

[apigee-devrel-bot]

Pipeline Report

Pipeline	Result	Elapsed Wall Time
references/js-callout	pass	116s
TOTAL PIPELINE	pass	116s

View details in Cloud Build (permission required)

Commit version: 5ddb87e

[danistrebel]

Closes #562

[danistrebel]

Closes #558