update to GAP 0.13 and Singular 0.25

Author: mohamed-barakat

Project.toml

@@ -12,8 +12,8 @@ Singular = "bcd08a7b-43d2-5ff7-b6d4-c458787f915c"
 
 [compat]
 CapAndHomalg = "1.6.0"
-GAP = "0.11, 0.12"
-Singular = "0.8, 0.9, 0.10, 0.11, 0.12, 0.13, 0.17, 0.18, 0.19, 0.20, 0.21, 0.22, 0.23, 0.24"
+GAP = "0.11, 0.12, 0.13"
+Singular = "0.8, 0.9, 0.10, 0.11, 0.12, 0.13, 0.17, 0.18, 0.19, 0.20, 0.21, 0.22, 0.23, 0.24, 0.25"
 julia = "1.8, 1.9, 1.10, 1.11"
 
 [extras]