v0.19.3

What's Changed

Noteworthy change: Principal now contains a toJSON method, returning an object with {"__principal__": <principal-string>}. This is compatible with the JSON reviver that is provided in @dfinity/utils, allowing you to easily serialize and deserialize structures containing Principals into and out of JSON

• feat: enhanced error message for missing canister id by @krpeacock in #759
• chore: lock npm version for CI by @krpeacock in #762
• feat: certificate time checks by @krpeacock in #763
• feat: Principal class serializes to JSON by @krpeacock in #766
• chore: npm audit by @krpeacock in #771
• fix: Principal JSON is compatible with @dfinity/utils jsonReviver helper by @krpeacock in #770
• chore: release v0.19.3 by @krpeacock in #772

Full Changelog: v0.19.2...v0.19.3