fix: protects the consts from being changed in other parts of the code.

Signed-off-by: Helio Frota <00hf11@gmail.com>

Author: helio-frota

Diff for: lib/bindings/http/constants.js

@@ -1,5 +1,5 @@
 // Commons
-module.exports = {
+module.exports = Object.freeze({
   HEADERS: "headers",
   CHARSET_DEFAULT: "utf-8",
 
@@ -68,4 +68,4 @@ module.exports = {
     DATA: "data",
     DATA_BASE64: "data_base64"
   }
-};
+});