bug: kit prompts users on special branches that they are out-of-date

**Describe the bug**
kits "out-of-date" detection is overly aggressive

**To Reproduce**
1. Install `develop`-branch kit (ahead of master)
2. Run a command
3. kit prompts "out of date" and suggests running `kit update`

**Expected behavior**
Only prompt out-of-date when actually out-of-date