Pg to bun (#148)

* start moving to bun

* changing more stuff

* more

* and yet more

* tests passing

* seems stable now

* more big changes

* small fix

* little fixes

vendor/github.com/jackc/pgproto3/v2/copy_done.go

@@ -0,0 +1,38 @@
+package pgproto3
+
+import (
+	"encoding/json"
+)
+
+type CopyDone struct {
+}
+
+// Backend identifies this message as sendable by the PostgreSQL backend.
+func (*CopyDone) Backend() {}
+
+// Frontend identifies this message as sendable by a PostgreSQL frontend.
+func (*CopyDone) Frontend() {}
+
+// Decode decodes src into dst. src must contain the complete message with the exception of the initial 1 byte message
+// type identifier and 4 byte message length.
+func (dst *CopyDone) Decode(src []byte) error {
+	if len(src) != 0 {
+		return &invalidMessageLenErr{messageType: "CopyDone", expectedLen: 0, actualLen: len(src)}
+	}
+
+	return nil
+}
+
+// Encode encodes src into dst. dst will include the 1 byte message type identifier and the 4 byte message length.
+func (src *CopyDone) Encode(dst []byte) []byte {
+	return append(dst, 'c', 0, 0, 0, 4)
+}
+
+// MarshalJSON implements encoding/json.Marshaler.
+func (src CopyDone) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type string
+	}{
+		Type: "CopyDone",
+	})
+}