build: migrate from deprecated logs verdaccio option

See: https://verdaccio.org/blog/
(cherry picked from commit f75a584)

Author: alan-agius4

tests/legacy-cli/verdaccio.yaml

@@ -42,7 +42,9 @@ packages:
     proxy: npmjs
 
 logs:
-  - { type: stdout, format: pretty, level: warn }
+  type: stdout
+  format: pretty
+  level: warn
 
 # https://github.com/verdaccio/verdaccio/issues/301
 server:

tests/legacy-cli/verdaccio_auth.yaml

@@ -17,12 +17,17 @@ uplinks:
       keepAlive: true
       maxSockets: 32
       maxFreeSockets: 8
+
 packages:
   '**':
     access: $authenticated
     proxy: local
+
 logs:
-  - { type: stdout, format: pretty, level: http }
+  type: stdout
+  format: pretty
+  level: warn
+
 # https://github.com/verdaccio/verdaccio/issues/301
 server:
   keepAliveTimeout: 0