make version constant placeholder more verbose

Author: micuat

src/core/constants.js

@@ -11,7 +11,8 @@ const _PI = Math.PI;
  * @property {String} VERSION
  * @final
  */
-export const VERSION = 'VERSIONCONST';
+export const VERSION =
+  'VERSION_CONST_WILL_BE_REPLACED_BY_BROWSERIFY_BUILD_PROCESS';
 
 // GRAPHICS RENDERER
 /**

tasks/build/browserify.js

@@ -79,7 +79,7 @@ module.exports = function(grunt) {
         })
         .on('end', function() {
           code = code.replace(
-            `'VERSIONCONST'`,
+            `'VERSION_CONST_WILL_BE_REPLACED_BY_BROWSERIFY_BUILD_PROCESS'`,
             grunt.template.process(`'<%= pkg.version %>'`)
           );