Upgrade to Node v14

Merge pull request #107 from Financial-Times/upgrade-node-to-v14

Upgrade Node to v14

Remove isomorphic-fetch dependency

This refactors the package not to use the isomorphic-fetch package as this pollutes the global scope. This change avoids there being multiple versions of fetch being used in an application.

A global fetch instance will still be used if available (such as in apps which use n-express), otherwise it will fall back to its own node-fetch implementation. This is the same behaviour as implemented by the n-fetch package.

#104

Remove unused 'request' dependency

Merge pull request #103 from Financial-Times/remove-unused-dependencies

Remove unused dependencies

Upgrade @financial-times/n-gage ^3.6.0 -> ^5.0.0

v6.1.2

Merge pull request #101 from Financial-Times/renovate-major-next-buil…

Document how to log errors correctly

Merge pull request #99 from Financial-Times/wheresrhys-patch-1

Document error logging finnickiness

Just check splunk hec token

Remove the check for node environment before logging to splunk.

Due to CI and vault changes, .env files on developers' machines and in test no longer have the token present, or have it blank

Fix SplunkHEC not logging because of non-JSON body

Fixes the bug on v6.0.2 that stopped splunk logging

• Use json-stringify-safe to stringify splunk body
• Add logging when there is an error logging to splunk

[DO NOT USE] Fix for JSON.stringify in Splunk Https Event Collector

WARNING: There is a bug in this release that prevents logging. Please use v6.0.3+

Allow circularly referenced JSON structures to be logged by Splunk Https Event Collector.

sourcetype

Allow for variable sourcetype

Remove Splunk forwarder

Removes the Splunk forwarder transport so that logs are only sent via the Https Event Collector.