compoundEval is not correctly implemented

[Losses]

Prosperities value is passed to compoundEval here, the type signature of the value is ([keyof Document, isDesc] | keyof Document)[].

LokiJS/src/lokijs.js

Lines 3364 to 3369 in 25b9a33

	var wrappedComparer =
	(function (props, data) {
	return function (a, b) {
	return compoundeval(props, data[a], data[b]);
	};
	})(properties, this.collection.data);

But compoundEval only support [keyof Document, isDesc][]:

LokiJS/src/lokijs.js

Line 385 in 25b9a33

field = prop[0];

LokiJS/src/lokijs.js

Line 394 in 25b9a33

res = sortHelper(val1, val2, prop[1]);

But do not support (keyof Document)[].