Remove stale cache

Currently when a `commit-with` is run it caches a commit template to use when committing with the same person again. If a new version is released that adds/removes from that file it should get overwritten

## Possible solution

A possible way to do this is to add some meta data to each template about when it was created and what version was used to create it. Then we can have rules like, if you are older than `n` days or the CLI version is different re-write the file.

Could make use of `commander` options, eg.

```
commit-with -f|--force ericadamski
```

which force writes the template file