sqlx-cli/README.md: document that <command> --help exists

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Austin Bonander 2020-05-18 18:50:15 -07:00 committed by Ryan Leckey
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@ -16,6 +16,8 @@ in the current working directory.
`database` and `migrate` subcommands support only Postgres; MySQL and SQLite are TODO.
For more details, run `sqlx <command> --help`.
```dotenv
# Postgres
DATABASE_URL=postgres://postgres@localhost/my_database