chore: release v2.0.0

[TerryHowe]

Bump `package.json` version to `2.0.0` in preparation for the v2.0.0 release.

What's in v2.0.0

• Bump `@actions/core` from `^2.0.3` to `^3.0.0` (chore(deps): Bump @actions/core from 2.0.3 to 3.0.0 #138)
• Bump `@actions/tool-cache` from `^3.0.1` to `^4.0.0` (chore(deps): Bump @actions/tool-cache from 3.0.1 to 4.0.0 #137)
• Replace `@vercel/ncc` with `esbuild` to support ESM-only toolkit packages (chore(deps): bump @actions/core to 3.x and @actions/tool-cache to 4.x #159)
• Add `scripts/generate-licenses.js` to regenerate `dist/licenses.txt` from bundled packages on every build (chore(deps): bump @actions/core to 3.x and @actions/tool-cache to 4.x #159)
• Pin `undici` to `>=6.24.1` to address 5 CVEs (fix: pin undici to >=6.24.1 to address CVEs #155)

[shizhMSFT]

LGTM