Update LICENSE

Author: pancetta

LICENSE

@@ -1,4 +1,4 @@
-Copyright (c) 2018, Parallel-in-Time (PinT) Algorithms
+Copyright (c) 2021, Parallel-in-Time (PinT) Algorithms
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
@@ -20,4 +20,4 @@ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.