Add Clang 13 (#9502)

Signed-off-by: Uilian Ries <uilianries@gmail.com>

Author: uilianries

conans/client/conf/__init__.py

@@ -96,7 +96,7 @@
         clang:
             version: ["3.3", "3.4", "3.5", "3.6", "3.7", "3.8", "3.9", "4.0",
                       "5.0", "6.0", "7.0", "7.1",
-                      "8", "9", "10", "11", "12"]
+                      "8", "9", "10", "11", "12", "13"]
             libcxx: [None, libstdc++, libstdc++11, libc++, c++_shared, c++_static]
             cppstd: [None, 98, gnu98, 11, gnu11, 14, gnu14, 17, gnu17, 20, gnu20, 23, gnu23]
             runtime: [None, MD, MT, MTd, MDd]

conans/client/migrations_settings.py

@@ -2394,7 +2394,7 @@
     clang:
         version: ["3.3", "3.4", "3.5", "3.6", "3.7", "3.8", "3.9", "4.0",
                   "5.0", "6.0", "7.0", "7.1",
-                  "8", "9", "10", "11", "12"]
+                  "8", "9", "10", "11", "12", "13"]
         libcxx: [None, libstdc++, libstdc++11, libc++, c++_shared, c++_static]
         cppstd: [None, 98, gnu98, 11, gnu11, 14, gnu14, 17, gnu17, 20, gnu20, 23, gnu23]
         runtime: [None, MD, MT, MTd, MDd]