Issue203 logical expression

[JayHuLBL]

This closes #203.

• fixed the logical expression
• update the standard version from version 10, to 17, the latest version, see https://www.npmjs.com/package/standard.

By running the npx standard, we will still see the warning:

jianjunhu@ubuntu:~/GitFolder/modelica-json$ npx standard
standard: Use JavaScript Standard Style (https://standardjs.com)
  /home/jianjunhu/GitFolder/modelica-json/test/test_jsonquery.js:21:5: Invalid loop. Its body allows only one iteration. (no-unreachable-loop)
  /home/jianjunhu/GitFolder/modelica-json/test/test_parser.js:54:25: Array.prototype.map() expects a return value from arrow function. (array-callback-return)

This would need to be addressed in separated issue.

[anandkp92]

@JayHuLBL Can you also make changes to the json2mo folder for logical_expression and simple_expression?