add array support for NonZeroI* in postgres (#3303)

* add array support for NonZeroI* in postgres

* run rustfmt

Author: JohannesIBK

sqlx-postgres/src/types/int.rs

@@ -1,4 +1,5 @@
 use byteorder::{BigEndian, ByteOrder};
+use std::num::{NonZeroI16, NonZeroI32, NonZeroI64};
 
 use crate::decode::Decode;
 use crate::encode::{Encode, IsNull};
@@ -153,3 +154,21 @@ impl Decode<'_, Postgres> for i64 {
         int_decode(value)
     }
 }
+
+impl PgHasArrayType for NonZeroI16 {
+    fn array_type_info() -> PgTypeInfo {
+        PgTypeInfo::INT2_ARRAY
+    }
+}
+
+impl PgHasArrayType for NonZeroI32 {
+    fn array_type_info() -> PgTypeInfo {
+        PgTypeInfo::INT4_ARRAY
+    }
+}
+
+impl PgHasArrayType for NonZeroI64 {
+    fn array_type_info() -> PgTypeInfo {
+        PgTypeInfo::INT8_ARRAY
+    }
+}