Fixing some data types and class declarations

Sorting/BubbleSorter.java

@@ -1,5 +1,5 @@
 package Sorting;
 
-public class BubbleSorter extends sorter{
+public class BubbleSorter extends Sorter{
     //a class to sort arrays of numbers using bubble sort
 }

Sorting/InsertionSorter.java

@@ -1,5 +1,5 @@
 package Sorting;
 
-public class InsertionSorter extends sorter{
+public class InsertionSorter extends Sorter{
     
 }

Sorting/SortResult.java

@@ -1,5 +1,6 @@
 package Sorting;
 
+import java.time.Duration;
 /**
  * This is a class to hold the efficiencty results of a sorter. We will use this
  * because we can only have one return value from a method, but want to get more