update field (#8)

Reviewed-on: #8
Co-authored-by: andrey <andrey@4devs.io>
Co-committed-by: andrey <andrey@4devs.io>

field/encoder_json.go

@@ -0,0 +1,23 @@
+package field
+
+import (
+	"encoding/json"
+	"strconv"
+)
+
+func NewEncoderJSON(opts ...func(*BaseEncoder)) BaseEncoder {
+	opts = append([]func(*BaseEncoder){
+		WithAppendString(strconv.AppendQuote),
+		WithDelimeter(':'),
+		WithDefaultValue(func(dst []byte, e Encoder, val Value) []byte {
+			js, err := json.Marshal(val.Any())
+			if err != nil {
+				return e.AppendValue(dst, ErrorValue(err))
+			}
+
+			return append(dst, js...)
+		}),
+	}, opts...)
+
+	return NewEncoder(opts...)
+}