libcurl is now optional. Updated to the latest versions of libcurl and expat. (#1992)

* libcurl is now optional.
Updated to the latest versions of libcurl and expat.

* No need for a libcurl option, libcurl is now only required if webready is.

Co-authored-by: shawn <[email protected]>

Author: LibreShawn

conanfile.py

@@ -22,7 +22,9 @@ def configure(self):
 
     def requirements(self):
         self.requires('zlib/1.2.11')
-        self.requires('libcurl/7.75.0')
+
+        if self.options.webready:
+            self.requires('libcurl/7.79.0')
 
         if os_info.is_windows and self.options.iconv:
             self.requires('libiconv/1.16')
@@ -35,7 +37,7 @@ def requirements(self):
         if self.options.xmp:
             self.requires('XmpSdk/2016.7@piponazo/stable') # from conan-piponazo
         else:
-            self.requires('expat/2.3.0')
+            self.requires('expat/2.4.1')
 
     def imports(self):
         self.copy('*.dll', dst='bin', src='bin')