chore(*): Add changeset

.changeset/little-numbers-jam.md

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+---
+'@clerk/shared': minor
+---
+
+Introduce isomorphic `isomorphicBtoa` helper in `@clerk/shared`.

.changeset/purple-pumas-study.md

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+---
+'gatsby-plugin-clerk': major
+'@clerk/chrome-extension': major
+'@clerk/clerk-js': major
+'@clerk/clerk-sdk-node': major
+'@clerk/backend': major
+'@clerk/fastify': major
+'@clerk/nextjs': major
+'@clerk/shared': major
+'@clerk/themes': major
+'@clerk/clerk-react': major
+'@clerk/remix': major
+'@clerk/types': major
+'@clerk/clerk-expo': major
+---
+Dropping support for Node 14 and 16 as they both reached EOL status. The minimal Node.js version required by Clerk is `18.18.0` now.