Merge pull request #199243 from Homebrew/libqalculate-pkgconf

libqalculate: migrate to `pkgconf`

Author: BrewTestBot

Formula/lib/libqalculate.rb

@@ -15,7 +15,7 @@ class Libqalculate < Formula
 
   depends_on "gettext" => :build
   depends_on "intltool" => :build
-  depends_on "pkg-config" => :build
+  depends_on "pkgconf" => :build
   depends_on "gmp"
   depends_on "gnuplot"
   depends_on "mpfr"