ci: stop testing against NodeJS v18 (#512)

* build(package): set minimal node version in engines field to v20
BREAKING CHANGE: Drop support for NodeJS v18

* build: set minimal node version in build script to v20

* ci: stop testing against NodeJS v18

fix(deps): update dependency @octokit/types to v14 (#505)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

 test: ReDos regex vulnerability, reported by @dayshift

fix: linting issues (#494)

fix(deps): bump `@octokit/types` to fix Deno compat (#483)

fix(types): add explicit `| undefined` to optional fields (#462)

When typescript is used with the option `exactOptionalProperty: true`, this code fails to typecheck if `undefined` is passed in for the response value.

This is because `exactOptionalProperty` makes tsc consider `?:..` different from `: ... | undefined` for more strictness.

fix: improve perf of request error instantiations (#444)

* add benchmarks
* remove call of captureStackTrace

fix(docs): correct title in README (#443)

chore: correct title

Co-authored-by: wolfy1339 <4595477+wolfy1339@users.noreply.github.com>

fix: ensure statusCode is always an integer (#439)

* fix: ensure statusCode is always an integer

* Update src/index.ts

fix(pkg): add `default` fallback and `types` export (#419)

* fix(pkg): add a default fallback

See octokit/core.js#665 octokit/core.js#667

* docs: add note on needed config changes for TypeScript