docs: Document r flag in tasks docs (#522)

Author: ken-kost

lib/mix/tasks/ash_postgres.create.ex

@@ -28,6 +28,7 @@ defmodule Mix.Tasks.AshPostgres.Create do
   ## Command line options
 
     * `--domains` - the domains who's repos you want to migrate.
+    * `-r, --repo` - the repo to create
     * `--quiet` - do not log output
     * `--no-compile` - do not compile before creating
     * `--no-deps-check` - do not compile before creating

lib/mix/tasks/ash_postgres.drop.ex

@@ -31,6 +31,7 @@ defmodule Mix.Tasks.AshPostgres.Drop do
   ## Command line options
 
     * `--domains` - the domains who's repos should be dropped
+    * `-r, --repo` - the repo to drop
     * `-q`, `--quiet` - run the command quietly
     * `-f`, `--force` - do not ask for confirmation when dropping the database.
       Configuration is asked only when `:start_permanent` is set to true

lib/mix/tasks/ash_postgres.migrate.ex

@@ -74,6 +74,8 @@ defmodule Mix.Tasks.AshPostgres.Migrate do
 
     * `--all` - run all pending migrations
 
+    * `--repo`, `-r` - the repo to migrate
+
     * `--step`, `-n` - run n number of pending migrations
 
     * `--to` - run all migrations up to and including version

lib/mix/tasks/ash_postgres.rollback.ex

@@ -32,6 +32,7 @@ defmodule Mix.Tasks.AshPostgres.Rollback do
   ## Command line options
     * `--domains` - the domains who's repos should be rolledback
     * `--all` - revert all applied migrations
+    * `--repo`, `-r` - the repo to rollback
     * `--step` / `-n` - revert n number of applied migrations
     * `--to` / `-v` - revert all migrations down to and including version
     * `--quiet` - do not log migration commands