Remove deprecated stuff from stdlib (#14699)

* update to the latest Jester

* remove deprecated procs from some stdlib modules

* 'criterion' is not maintained anymore and relies on obsolete stuff

tools/niminst/debcreation.nim

@@ -101,7 +101,7 @@ proc createChangelog(pkgName, version, maintainer: string): string =
   addN("  * Initial release.")
   addN("")
   addN(" -- " & maintainer & "  " &
-       formatDateTime(getGMTime(getTime()), "+0000"))
+       formatDateTime(utc(getTime()), "+0000"))
 
 proc createRules(): string =
   ## Creates a nim application-agnostic rules file for building deb packages.

tools/nimweb.nim

@@ -421,7 +421,7 @@ proc generateRss(outputFilename: string, news: seq[TRssItem]) =
   output.write(link(href = rssNewsUrl))
   output.write(id(rssNewsUrl))
 
-  let now = getGMTime(getTime())
+  let now = utc(getTime())
   output.write(updatedDate($now.year, $(int(now.month) + 1), $now.monthday))
 
   for rss in news:

tools/website.nimf

@@ -250,7 +250,7 @@ runForever()
 <p>This section lists the companies and individuals that are, very kindly, contributing a
 monthly amount to help sustain Nim's development. For more details take a
 look at the <a href="https://salt.bountysource.com/teams/nim">Bountysource campaign</a>.</p>
-<p class="lastUpdate">Last updated: ${getTime().getGMTime().format("dd/MM/yyyy")}</p>
+<p class="lastUpdate">Last updated: ${getTime().utc().format("dd/MM/yyyy")}</p>
 <dl>
 ${generateSponsors(activeSponsors)}
 </dl>