updated test cases and readme

README.md

     String[] array = {"quick", "brown", "fox", "jumps", "over", "the", "lazy", "dog"};
     
     // : When
-    boolean outcome = StringArrayUtils.getFirstElement(array);
+    String outcome = StringArrayUtils.getFirstElement(array);
     
     // : Then
     System.out.println(outcome);
     String[] array = {"brown", "fox", "jumps", "over", "the", "lazy", "dog"};
     
     // : When
-    boolean outcome = StringArrayUtils.getFirstElement(array);
+    String outcome = StringArrayUtils.getFirstElement(array);
     
     // : Then
     System.out.println(outcome);
     String[] array = {"fox", "jumps", "over", "the", "lazy", "dog"};
     
     // : When
-    boolean outcome = StringArrayUtils.getFirstElement(array);
+    String outcome = StringArrayUtils.getFirstElement(array);
     
     // : Then
     System.out.println(outcome);
     String[] array = {"the", "quick", "brown", "fox", "jumps", "over", "the", "lazy", "dog"};
     
     // : When
-    boolean outcome = StringArrayUtils.getSecondElement(array);
+    String outcome = StringArrayUtils.getSecondElement(array);
     
     // : Then
     System.out.println(outcome);
     // : Given
     String[] array = {"quick", "brown", "fox", "jumps", "over", "the", "lazy", "dog"};    
     // : When
-    boolean outcome = StringArrayUtils.getFirstElement(array);
+    String outcome = StringArrayUtils.getFirstElement(array);
     
     // : Then
     System.out.println(outcome);
     // : Given
     String[] array = {"brown", "fox", "jumps", "over", "the", "lazy", "dog"};    
     // : When
-    boolean outcome = StringArrayUtils.getFirstElement(array);
+    String outcome = StringArrayUtils.getFirstElement(array);
     
     // : Then
     System.out.println(outcome);
     String[] array = {"the", "quick", "brown", "fox", "jumps", "over", "the", "lazy", "dog"};
     
     // : When
-    boolean outcome = StringArrayUtils.getLastElement(array);
+    String outcome = StringArrayUtils.getLastElement(array);
     
     // : Then
     System.out.println(outcome);
     String[] array = {"the", "quick", "brown", "fox", "jumps", "over", "the", "lazy"};
     
     // : When
-    boolean outcome = StringArrayUtils.getLastElement(array);
+    String outcome = StringArrayUtils.getLastElement(array);
     
     // : Then
     System.out.println(outcome);
     String[] array = {"the", "quick", "brown", "fox", "jumps", "over"};
     
     // : When
-    boolean outcome = StringArrayUtils.getLastElement(array);
+    String outcome = StringArrayUtils.getLastElement(array);
     
     // : Then
     System.out.println(outcome);
     String[] array = {"the", "quick", "brown", "fox", "jumps", "over", "the", "lazy", "dog"};
     
     // : When
-    boolean outcome = StringArrayUtils.getSecondToLastElement(array);
+    String outcome = StringArrayUtils.getSecondToLastElement(array);
     
     // : Then
     System.out.println(outcome);