Update to use new signals specification

[silesky]

• Import from new "@segment/analytics-signals-runtime";
• Consume new types
• Fix tests
• Fix CI

[changeset-bot]

🦋 Changeset detected

Latest commit: 1a412b9

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@segment/analytics-signals	Major

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.64%. Comparing base (ef021fe) to head (1a412b9).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1311      +/-   ##
==========================================
+ Coverage   82.87%   83.64%   +0.77%     
==========================================
  Files         225      213      -12     
  Lines        6019     5943      -76     
  Branches     1365     1358       -7     
==========================================
- Hits         4988     4971      -17     
+ Misses       1031      972      -59     

Flag	Coverage Δ
browser	92.21% <ø> (ø)
core	89.86% <ø> (ø)
node	87.93% <ø> (ø)

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