feat(website): add rc3 blog post (#2504)

packages/neo-one-website/blog/2021-07-02-neo-one-rc3-announcement.md

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+---
+slug: 2021/03/18/neo-one-rc3-announcement
+title: NEO•ONE RC3 Announcement
+author: The NEO•ONE Team
+twitter: https://twitter.com/neo_one_suite
+---
+
+## NEO•ONE RC3
+
+We are excited to announce our latest release of NEO•ONE. For this release we have targeted RC3, the latest stable release of the [N3](https://medium.com/neo-smart-economy/introducing-neo-n3-the-next-evolution-of-the-neo-blockchain-b2960c4def6e) protocol currently under development.
+
+This release brings the entire NEO•ONE suite up-to-date with Neo N3 Release Candidate 3. This means that our node, client, and compiler packages are all compatible with RC3. Users can now use NEO•ONE to write, compile, test, and deploy their smart contracts for N3.
+
+To get started with NEO•ONE see [here](/docs/getting-started). Make sure to install our `@prerelease` tagged NPM packages for the latest N3 versions. For example, `yarn add @neo-one/cli@prerelease`.
+
+### Further Work
+
+We are working hard to get NEO•ONE ready for the N3 MainNet release. We are fixing bugs, adding test coverage, upgrading more APIs, and making NEO•ONE more user friendly.
+
+### Support
+
+- For help using NEO•ONE feel free to ask questions on our [Discord server](https://discord.gg/S86PqDE)
+- For helpful YouTube videos on how to use NEO•ONE go to our [YouTube channel](https://www.youtube.com/channel/UCya5J1Tt2h-kX-I3a7LOvtw)
+- For more general questions or concerns feel free to reach out on [Twitter](https://twitter.com/neo_one_suite)