Merge branch 'arjen-ag5/master' into pg_arrays

# Conflicts:
#	generator/template/model_template.go
#	generator/template/sql_builder_template.go
#	internal/jet/expression.go
#	postgres/cast.go
#	postgres/columns.go
#	postgres/expressions.go
#	postgres/insert_statement_test.go
#	postgres/literal.go
#	tests/postgres/alltypes_test.go
#	tests/postgres/generator_template_test.go
#	tests/postgres/scan_test.go
#	tests/postgres/select_test.go

generator/postgres/query_set.go

@@ -66,6 +66,7 @@ select
     not attr.attnotnull as "column.isNullable",
     attr.attgenerated = 's' as "column.isGenerated",
     attr.atthasdef as "column.hasDefault",
+    attr.attndims as "dataType.dimensions",
     (case
         when tp.typtype = 'b' AND tp.typcategory <> 'A' then 'base'
         when tp.typtype = 'b' AND tp.typcategory = 'A' then 'array'