fix: add missing alias for valid types (#1388)

Author: alvarowolfx

src/bigquery.ts

@@ -1012,10 +1012,19 @@ export class BigQuery extends Service {
       'TIMESTAMP',
       'BYTES',
       'NUMERIC',
+      'DECIMAL',
       'BIGNUMERIC',
+      'BIGDECIMAL',
       'BOOL',
       'INT64',
+      'INT',
+      'SMALLINT',
+      'INTEGER',
+      'BIGINT',
+      'TINYINT',
+      'BYTEINT',
       'FLOAT64',
+      'FLOAT',
       'STRING',
       'GEOGRAPHY',
       'ARRAY',