git: Only trigger tests on push OR pull_request

Move minUint64Value and maxUint64Value constants to encoding test

removing uniques test, part of spec algo testing

algorithm change

Initial fuzz tests

git: Ignore testdata/fuzz

bug: Fix decode panic for invalid input

Use []rune instead of string in Encode/Decode

git: Ignore profile.out and sqids-go.test

Check that the alphabet does not contain multibyte characters

Extract filterBlocklist

git: blocklist.go is not binary

doc: Remove CHANGELOG.md

doc: Update embedmd regular expressions so that GitHub hides them correctly

examples: Add initial examples for use in the README