Bump to NLPModels 0.20

Author: tmigot

Project.toml

@@ -8,7 +8,7 @@ NLPModels = "a4795742-8479-5a88-8948-cc11e1c8c1a6"
 Printf = "de0858da-6303-5e67-8744-51eddeeeb8d7"
 
 [compat]
-NLPModels = "0.15, 0.16, 0.17, 0.18, 0.19"
+NLPModels = "0.15, 0.16, 0.17, 0.18, 0.19, 0.20"
 julia = "^1.6"
 
 [extras]