j2xParser.parse throws error if value is null #86
Description
var Parser = require("fast-xml-parser").j2xParser;
new Parser().parse({ value: null })error:
TypeError: Cannot convert undefined or null to object
at Function.keys (<anonymous>)
at Parser.j2x (/tmp/xml2/node_modules/fast-xml-parser/src/j2x.js:79:25)
at Parser.j2x (/tmp/xml2/node_modules/fast-xml-parser/src/j2x.js:137:37)
at Parser.parse (/tmp/xml2/node_modules/fast-xml-parser/src/j2x.js:73:17)
expect: <value />