Add helper to parse Session ID from different GA versions (#108)

* add parseSessionCookie helper method

This helper parses the `_GA_{ga_id}` session cookie (both GS1 & GS2 formats) into an associative array of data.

* add tests for praseing session cookies

Update ci.yml

Fix url validation in pageview and related tests

Clean up for Version 2.0 (#101)

Add Firebase handler to support internally stored/managed events from…

… applications (#100)

Update static parameters to match constructor of Analytics.php (#99)

This should remove confusion from copying the readme code directly.

Fix: Using user_id before initialization with tests (#94)

license: replace "MIT" with "The Unlicense"

Making sure everyone can use this library without much consideration except libality limitations.

Add: Send user-provided data with User-ID using the Measurement Proto…

…col (#91)

Fixes to reused workflow (#89)