Updated copyright date to correct date

src/Problems/Problem2.rs

@@ -5,7 +5,7 @@
 //The sum of the even Fibonacci numbers less than 4,000,000
 //Unless otherwise listed all non-standard includes are my own creation and available from https://bibucket.org/Mattrixwv/JavaClasses
 /*
-	Copyright (C) 2019  Matthew Ellison
+	Copyright (C) 2020  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

src/Problems/Problem3.rs

@@ -5,7 +5,7 @@
 //The largest prime factor of 600851475143
 //Unless otherwise listed all non-standard includes are my own creation and available from https://bibucket.org/Mattrixwv/JavaClasses
 /*
-	Copyright (C) 2019  Matthew Ellison
+	Copyright (C) 2020  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

src/Problems/Problem4.rs

@@ -5,7 +5,7 @@
 //Find the largest palindrome made from the product of two 3-digit numbers
 //Unless otherwise listed all non-standard includes are my own creation and available from https://bibucket.org/Mattrixwv/JavaClasses
 /*
-	Copyright (C) 2019  Matthew Ellison
+	Copyright (C) 2020  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

src/Problems/Problem5.rs

@@ -5,7 +5,7 @@
 //What is the smallest positive number that is evenly divisible by all of the numbers from 1 to 20?
 //Unless otherwise listed all non-standard includes are my own creation and available from https://bibucket.org/Mattrixwv/JavaClasses
 /*
-	Copyright (C) 2019  Matthew Ellison
+	Copyright (C) 2020  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