Add Harry Jack (@hrj4) to list of contributors

Author: wilfwilson

PackageInfo.g

@@ -248,6 +248,13 @@ Persons := [
     Place         := "Kaiserslautern, Germany",
     Institution   := "RPTU Kaiserslautern-Landau"),
 
+  rec(
+    LastName      := "Jack",
+    FirstNames    := "Harry",
+    IsAuthor      := true,
+    IsMaintainer  := false,
+    Email         := "[email protected]"),
+
   rec(
     LastName      := "Jefferson",
     FirstNames    := "Christopher",