Change settings.modelChecker.targets to take an array instead of string

test/cmdlineTests/standard_model_checker_targets_empty_array/input.json

@@ -0,0 +1,30 @@
+{
+	"language": "Solidity",
+	"sources":
+	{
+		"A":
+		{
+			"content": "// SPDX-License-Identifier: GPL-3.0\npragma solidity >=0.0;\n\ncontract test {
+					uint[] arr;
+					function f(address payable a, uint x) public {
+						require(x >= 0);
+						--x;
+						x + type(uint).max;
+						2 / x;
+						a.transfer(x);
+						assert(x > 0);
+						arr.pop();
+						arr[x];
+					}
+				}"
+		}
+	},
+	"settings":
+	{
+		"modelChecker":
+		{
+			"engine": "all",
+			"targets": []
+		}
+	}
+}