Add support of Single-Dimensional Arrays initialization

[metoule]

First step towards fixing #194 : single-dimension array initialization.

You can now write:

var target = new Interpreter();
var arr = target.Eval<int[]>("new int[] { 1, 2 }");
Assert.AreEqual(2, arr.Length);
Assert.AreEqual(1, arr[0]);
Assert.AreEqual(2, arr[1]);

Jagged arrays are also supported:

var target = new Interpreter();
var arr = target.Eval<int[][]>("new int[][] { new int[] { 1, 2, }, new int[] { 3, 4, }, }");

Multidimensional arrays are not supported, because I couldn't find the Linq expression needed to create them: NewArrayInit can initialize a single dimension array with values, while NewArrayBounds can initialize a multidimension array, but without values. Considering how rare multidimensional arrays are, I think the limitation is not really an issue.

[davideicardi]

Very good! Thank you! 👏