edgeql-go: only fetch protocol version once (#396)

This is a minor optimization.

Allow TLSOptions.ServerName use with TLSOptions.SecurityMode (#393)

Bump shared client testcases (#392)

Accept null branch & database in credentials files (#385)

The gel CLI recently started writing credentials files that use `null`
to indicate that the default branch name should be used instead of
specifying a value explicitly. This caused the following error in
gel-go.

```
`database` must be a string
```

Closes #382

go mod tidy

Move documentation examples into Example functions (#363)

This makes it so the examples are compiled and run with the test suite.

fixes #362

Configure warning handler for edgeql-go (#367)

fixes #364

Rename edgedb.com urls to geldata.com (#356)

Add examples for Client.With*() methods (#353)

fixes #288

Co-authored-by: Scott Trinh <[email protected]>

Add Client.WithQueryTag() (#344)

fixes #325