Add support for "Group" and "Order" as objects for FROM clause

[douglascayers]

The reserved list of keywords defined in the isReserved function check for GROUP and ORDER words as shown below:

function isReserved(word) {
  return /^(SELECT|FROM|AS|USING|WHERE|AND|OR|NOT|GROUP|BY|ORDER|LIMIT|OFFSET|FOR|TRUE|FALSE|NULL)$/i.test(word);
}

However, the words Group and Order are queryable standard objects in Salesforce.

This issue is to request that the isReserved(word) function be modified so that it looks more specifically for GROUP BY and ORDER BY as reserved words.

For example, the following query is valid SOQL but fails to parse because the word Group in the FROM clause is flagged as a reserved word.

SELECT Name FROM Group WHERE Type = 'Queue' ORDER BY CreatedDate ASC