feat(modules): migrate to go modules and bump go version 1.14.4

- migrate to go module
- bump go version 1.14.4

Signed-off-by: prateekpandey14 <prateek.pandey@mayadata.io>

vendor/github.com/json-iterator/go/reflect_marshaler.go

@@ -3,8 +3,9 @@ package jsoniter
 import (
 	"encoding"
 	"encoding/json"
-	"github.com/modern-go/reflect2"
 	"unsafe"
+
+	"github.com/modern-go/reflect2"
 )
 
 var marshalerType = reflect2.TypeOfPtr((*json.Marshaler)(nil)).Elem()
@@ -93,10 +94,17 @@ func (encoder *marshalerEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
 		stream.WriteNil()
 		return
 	}
-	bytes, err := json.Marshal(obj)
+	marshaler := obj.(json.Marshaler)
+	bytes, err := marshaler.MarshalJSON()
 	if err != nil {
 		stream.Error = err
 	} else {
+		// html escape was already done by jsoniter
+		// but the extra '\n' should be trimed
+		l := len(bytes)
+		if l > 0 && bytes[l-1] == '\n' {
+			bytes = bytes[:l-1]
+		}
 		stream.Write(bytes)
 	}
 }