sendBeacon calls can throw Errors (#71)
sendBeacon calls can throw Errors (#71)

# Why

We got reports from customers that the sendBeacon API fails in certain
Edge 14.X versions.

# What

Unfortunately, Saucelabs does not support the specific Edge versions in
questions. Consequently, we cannot reproduce this/build E2E test cases
for this. We take the conservative route and assume that the failure
report is correct (I found similar reports affecting other APM tools)
and add a try/catch arround the `sendBeacon` call to fall back to
regular `XMLHttpRequest` calls.
instana/weasel,instana/weasel