Bump version, update links (#1565)

# 3.0.0b3 / 2020-07-22

**General**

- Render Hint content on the server side and provide it in the Hint API response
  - In a sense this would deprecate the `content` field but it's left in for backwards compatability

**API**

- Add `html` item for `GET /api/v1/hints/[hint_id]` which contains the rendered HTML of the Hint content
- Remove `content` from `GET /api/v1/hints`

**Admin Panel**

- Fix an issue where an admin couldn't submit more than once on a challenge preview
- Fix an issue where the theme settings editor wouldn't load if the theme settings JSON was malformed

**Miscellaneous**

- Fix an issue where email sending would be broken if the CTF name contained a colon

package.json

@@ -1,6 +1,6 @@
 {
   "name": "ctfd",
-  "version": "3.0.0b2",
+  "version": "3.0.0b3",
   "description": "CTFd is a Capture The Flag framework focusing on ease of use and customizability. It comes with everything you need to run a CTF and it's easy to customize with plugins and themes.",
   "main": "index.js",
   "directories": {