Contributors updated

Author: dcamarmas

public/content/contributors.yml

@@ -2,7 +2,14 @@
   description: Beta tester
   versions:
     - v1.3
-    - v1.4
+    - v2.1
+    - v3.0
+    - v3.1
+    - v3.2
+    - v4.0
+    - v4.1
+    - v5.0
+    - v6.0
   links:
     github: edelpozop
     researchgate: Elias-Del-Pozo-Punal-2