fixed javascript enumeration boolean type issue

Author: HugoMario

modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/JavascriptClientCodegen.java

@@ -1412,7 +1412,7 @@ public String toEnumVarName(String value, String datatype) {
 
     @Override
     public String toEnumValue(String value, String datatype) {
-        if ("Integer".equals(datatype) || "Number".equals(datatype)) {
+        if ("Integer".equals(datatype) || "Number".equals(datatype) || "Boolean".equals(datatype)) {
             return value;
         } else {
             return "\"" + escapeText(value) + "\"";