Change to Refack's GYP fork

See

nodejs/node#26620

and

bincrafters/community#851

for further reasoning

conanfile.py

@@ -7,9 +7,9 @@
 
 class GypinstallerConan(ConanFile):
     name = "gyp_installer"
-    version = "20190423"
+    version = "6.0.3"
     url = "https://github.com/bincrafters/conan-gyp_installer"
-    homepage = "https://github.com/bincrafters/gyp"
+    homepage = "https://github.com/refack/GYP"
     description = "GYP is a Meta-Build system: a build system that generates other build systems"
     author = "Bincrafters <bincrafters@gmail.com>"
     topics = ("conan", "gyp", "installer", "meta-build-system", "build-system")
@@ -19,7 +19,7 @@ class GypinstallerConan(ConanFile):
     _source_subfolder = "source_subfolder"
 
     def source(self):
-        sha256 = "5b8567e8f642c86f283c2bade2659315acb250cff59d5d95df36aa432cc9d56e"
+        sha256 = "803d844e04b36caba83442e71ffb3775a04afbd8a75453eed439de5c92d041bb"
         tools.get("{}/archive/{}.tar.gz".format(self.homepage, self.version), sha256=sha256)
         archive_name = "gyp-{}".format(self.version)
         os.rename(archive_name, self._source_subfolder)