Update changelog.

Fix up the usage for `\llm` command.

Merge pull request #205 from dbcli/check-db-connection

Check for a DB connection before running an LLM query.

Merge pull request #202 from dbcli/llm-exception-handling

Llm exception handling

Merge pull request #201 from dbcli/redirect-stderr

Redirect both stdout and stderr while capturing output.

Update changelog for 1.14.0 release.

Merge pull request #195 from dbcli/use-setup-scm

Use setup scm

Merge pull request #194 from dbcli/use-setup-scm

Use setup scm

Version 1.13.0

Merge branch 'fix-special-cmd-d'