Document duckdb support

Author: nene

README.md

@@ -7,7 +7,7 @@
 It started as a port of a [PHP Library][], but has since considerably diverged.
 
 It supports various SQL dialects:
-GCP BigQuery, IBM DB2, Apache Hive, MariaDB, MySQL, TiDB, Couchbase N1QL, Oracle PL/SQL, PostgreSQL, Amazon Redshift, SingleStoreDB, Snowflake, Spark, SQL Server Transact-SQL, Trino (and Presto).
+GCP BigQuery, IBM DB2, DuckDB, Apache Hive, MariaDB, MySQL, TiDB, Couchbase N1QL, Oracle PL/SQL, PostgreSQL, Amazon Redshift, SingleStoreDB, Snowflake, Spark, SQL Server Transact-SQL, Trino (and Presto).
 See [language option docs](docs/language.md) for more details.
 
 It does not support:

docs/dialect.md

@@ -24,6 +24,7 @@ The following dialects can be imported from `"sql-formatter"` module:
 - `bigquery` - [GCP BigQuery][]
 - `db2` - [IBM DB2][]
 - `db2i` - [IBM DB2i][] (experimental)
+- `duckdb` - [DuckDB][]
 - `hive` - [Apache Hive][]
 - `mariadb` - [MariaDB][]
 - `mysql` - [MySQL][]
@@ -73,6 +74,7 @@ You likely only want to use this if your other alternative is to fork SQL Format
 [gcp bigquery]: https://cloud.google.com/bigquery
 [ibm db2]: https://www.ibm.com/analytics/us/en/technology/db2/
 [ibm db2i]: https://www.ibm.com/docs/en/i/7.5?topic=overview-db2-i
+[duckdb]: https://duckdb.org/
 [apache hive]: https://hive.apache.org/
 [mariadb]: https://mariadb.com/
 [mysql]: https://www.mysql.com/

docs/language.md

@@ -16,6 +16,7 @@ const result = format('SELECT * FROM tbl', { language: 'sqlite' });
 - `"bigquery"` - [GCP BigQuery][]
 - `"db2"` - [IBM DB2][]
 - `"db2i"` - [IBM DB2i][] (experimental)
+- `"duckdb"` - [DuckDB][]
 - `"hive"` - [Apache Hive][]
 - `"mariadb"` - [MariaDB][]
 - `"mysql"` - [MySQL][]
@@ -50,6 +51,7 @@ See docs for [dialect][] option.
 [gcp bigquery]: https://cloud.google.com/bigquery
 [ibm db2]: https://www.ibm.com/analytics/us/en/technology/db2/
 [ibm db2i]: https://www.ibm.com/docs/en/i/7.5?topic=overview-db2-i
+[duckdb]: https://duckdb.org/
 [apache hive]: https://hive.apache.org/
 [mariadb]: https://mariadb.com/
 [mysql]: https://www.mysql.com/

package.json

@@ -39,7 +39,8 @@
     "trino",
     "presto",
     "prestosql",
-    "snowflake"
+    "snowflake",
+    "duckdb"
   ],
   "files": [
     "dist",