Updated libraries and increased test coverage

src/main/java/com/mattrixwv/Stopwatch.java

@@ -1,10 +1,10 @@
 //JavaClasses/src/main/java/mattrixwv/Stopwatch.java
 //Matthew Ellison (Mattrixwv)
 // Created: 03-01-19
-//Modified: 06-26-22
+//Modified: 04-13-23
 //This file contains a class that is used to time the execution time of other programs
 /*
-Copyright (C) 2022  Matthew Ellison
+Copyright (C) 2023  Matthew Ellison
 
 	This program is free software: you can redistribute it and/or modify
 	it under the terms of the GNU Lesser General Public License as published by
@@ -122,6 +122,10 @@ public class Stopwatch{
 			}
 		}
 
+		if(duration < 0){
+			resolution = TIME_RESOLUTION.ERROR;
+		}
+
 		//Turn the number into a string
 		int durationFraction = (int)Math.round(((duration % 1) * 1000));
 		String time = String.format("%d.%03d", duration.intValue(), durationFraction);
@@ -143,11 +147,6 @@ public class Stopwatch{
 
 	@Override
 	public String toString(){
-		try{
-			return getStr();
-		}
-		catch(InvalidResult error){
-			return "There was an error in getStr(): " + error;
-		}
+		return getStr();
 	}
 }