update packages to latest version

node_modules/npm/doc/api/npm-search.md

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+npm-search(3) -- Search for packages
+====================================
+
+## SYNOPSIS
+
+    npm.commands.search(searchTerms, [silent,] [staleness,] callback)
+
+## DESCRIPTION
+
+Search the registry for packages matching the search terms. The available parameters are:
+
+* searchTerms:
+  Array of search terms. These terms are case-insensitive.
+* silent:
+  If true, npm will not log anything to the console.
+* staleness:
+  This is the threshold for stale packages. "Fresh" packages are not refreshed
+  from the registry. This value is measured in seconds.
+* callback:
+  Returns an object where each key is the name of a package, and the value
+  is information about that package along with a 'words' property, which is
+  a space-delimited string of all of the interesting words in that package.
+  The only properties included are those that are searched, which generally include:
+
+    * name
+    * description
+    * maintainers
+    * url
+    * keywords
+
+A search on the registry excludes any result that does not match all of the
+search terms. It also removes any items from the results that contain an
+excluded term (the "searchexclude" config). The search is case insensitive
+and doesn't try to read your mind (it doesn't do any verb tense matching or the
+like).