v1.5.0

Changelog

• 2eded28 Add example for google cloud extensions
• b66eacd Add mutex for state transition id collection
• 89fc7e4 Add support for price functions on shipping zone rate tiers
• f7f3f45 Consolidate price and priceFunction
• 1de940a Implement separate resource for state_transitions
• 88fe9ef Refactor the code for shipping zone rates.
• 35af7c0 Remove error return from elementFromSlice func
• 820b3cb Revert "Add support for price functions on shipping zone rate tiers"
• 95b1451 Revert "Consolidate price and priceFunction"
• 383fe6e Set release date
• 2c4d32d Update changelog
• 3ec7224 Update docs
• 916f184 Upgrade to run with Go 1.19