Publish `convert` command and add new documentation page (#700)

This PR publishes the new subcommand `convert`, and adds a new
documentation page.

This must be merged before the v0.10.0 release.

---------

Co-authored-by: Andrew Farries <andyrb@gmail.com>

Add missing options to duplicated FK constraints (#671)

The new options in FK constraints (on update action, match type, etc.)
were missing from the duplication process. Thus, the options set
in the constraint disappeared after modifying columns with foreign
key constraints.

Specify static linking for linux builds

TEMP: Only skip homebrew

TEMP: Don't skip publish

Run the `build` workflow on tag push (#520)

We need this to be able to create a release.

Allow configuration of batch delay (#410)

You can now configure a delay after each batch has completed. It can be
configured in three ways:

* The `--backfill-batch-delay` CLI parameter
* The `PGROLL_BACKFILL_BATCH_DELAY` environment variable
* The `roll.WithBackfillBatchDelay` functional option

It defaults to 0 if not set and all values should be provided using the
Go [duration format](https://pkg.go.dev/time#ParseDuration).

Closes #168

Support create/drop index with uppercase names (#356)

Fixes #355

Postgres stores index names with uppercase characters in the `pg_index`
catalog using the quoted version of the name. For example:

```
"idx_USERS_name"
```

whereas a lowercase index name would be stored as:

```
idx_users_name
```

This is different to how other object types are stored in their
respective catalogs. For example, table names are stored in
the`pg_class` catalog without quotes, regardless of whether they contain
uppercase characters.

This makes it necessary to strip quotes from index names when retrieving
them from the `pg_index` catalog when building the internal schema
representation.

Run migration tests in a non-`public` schema as part of CI (#279)

Add another dimension to the test matrix so that migration tests are run
in both the `public` and a non-`public` schema.

#276 made it possible to run
migration tests in schema other than `public`. Doing so highlighted some
issues that are fixed by #278.

Fixes #273.

Use org-level `GIT_TOKEN` for brew tap update (#215)

As described in the GoReleaser docs:
https://goreleaser.com/errors/resource-not-accessible-by-integration/