feat: warn on deprecated config (npm#62)

Author: lukekarrys

lib/index.js

@@ -506,10 +506,9 @@ class Config {
   }
 
   [_checkDeprecated] (key, where, obj, kv) {
-    // XXX a future npm version will make this a warning.
-    // An even more future npm version will make this an error.
+    // XXX(npm9+) make this throw an error
     if (this.deprecated[key]) {
-      log.verbose('config', key, this.deprecated[key])
+      log.warn('config', key, this.deprecated[key])
     }
   }
 

test/index.js

@@ -355,7 +355,7 @@ loglevel = yolo
       ['warn', 'invalid config', 'Must be one or more', 'numeric value'],
       ['warn', 'invalid config', 'prefix=true', 'set in command line options'],
       ['warn', 'invalid config', 'Must be', 'valid filesystem path'],
-      ['verbose', 'config', 'also', 'Please use --include=dev instead.'],
+      ['warn', 'config', 'also', 'Please use --include=dev instead.'],
       ['warn', 'invalid config', 'loglevel="yolo"',
         `set in ${resolve(path, 'project/.npmrc')}`],
       ['warn', 'invalid config', 'Must be one of:',
@@ -506,7 +506,7 @@ loglevel = yolo
       ['warn', 'invalid config', 'Must be one or more', 'numeric value'],
       ['warn', 'invalid config', 'prefix=true', 'set in command line options'],
       ['warn', 'invalid config', 'Must be', 'valid filesystem path'],
-      ['verbose', 'config', 'also', 'Please use --include=dev instead.'],
+      ['warn', 'config', 'also', 'Please use --include=dev instead.'],
     ])
   })