Log Message:
Update to 0.9996. From the changelog:

- Fixed an error where Oracle sometimes truncated timestamp formats so
  that date parsing failed. Thanks to Johann Wilfling for the report and
  @nmaqsudov for the solution (#316).
- Added pager configuration, prioritizing the new `core.pager`
  configuration variable over the `$PAGER` environment variable. The new
  `$SQITCH_PAGER` environment variable trumps all. Thanks to Yati Sagade
  for the pull request (#329).
- Documented the `core.editor` configuration variable.
- Updated PostgreSQL registry detection to avoid errors when not running
  Sqitch as a superuser and the registry schema already exists. Done by
  looking for the `changes` table in the `pg_tables` view instead of
  looking for the registry schema in the `pg_namespace` catalog table,
  and by using `CREATE SCHEMA IF NOT EXISTS` on PostgreSQL 9.3 and
  higher. Thanks to @djk447 for the pull request (#307).
- Updated PostgreSQL registry detection to avoid errors when the `psql`
  client is newer than the server version. Sqitch now fetches the version
  from the server instead of parsing it from the client.
- Specifying a change before a target name on the command-line no longer
  ignores the target (#281).
- The `--db-*` options are now more consistently applied to a target,
  including when the target is specified as a URI (#293).
- `HEAD` and `ROOT` are now properly recognized as aliases for `@HEAD`
  and `@ROOT`, when querying the database. This was supposedly done in
  v0.991, but due to a bug, it wasn't really. Sorry about that.
- The `revert` and `verify` commands will now fail if a change is
  specified and matches multiple changes. This happens when referencing a
  reworked change only by its name. In this case, Sqitch will emit an
  error listing properly tag-qualified changes to use. Suggested by Jay
  Hannah (#312).
- Sqitch no longer returns an error when a target name is passed to a
  command and the default target's plan file does not exist (#324).
- Added missing options to the `rework` usage statement. Thanks to Jay
  Hannah for the PR (#342).
- Passing an engine name or plan file as the `<database>` parameter to
  the `log`, `status`, and `upgrade` commands now works correctly,
  matching what the documention has said for some time (#324).
- Added the `--target` option to the `plan` and `show` commands.
- Added the `<database>` parameter to the `plan` command.
- Sqitch now loads targets from all config files, not just the local
  file, when trying to determine if a `<database>` parameter is a plan
  file name.
- Improved the error message when a change is found more than once in a
  plan, typically a reworked changed referenced only by name. The error
  will no longer be "Key at multiple indexes", but "Change is \ 
ambiguous.
  Please specify a tag-qualified change:", followed by a list of
  tag-qualified variants of the change.
- Fixed a bug where the verify command would return a database error when
  it finds no registory. Now it reports that the registry wasn't found in
  the database.