build: compile with C++20 support

Closes: #45402
PR-URL: #45427
Fixes: #45402
Reviewed-By: Michael Dawson <midawson@redhat.com>
Reviewed-By: Steven R Loomis <srl295@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Stephen Belanger <admin@stephenbelanger.com>
Reviewed-By: Yagiz Nizipli <yagiz.nizipli@sentry.io>
Reviewed-By: Moshe Atlow <moshe@atlow.co.il>
Reviewed-By: Ulises Gascón <ulisesgascongonzalez@gmail.com>

Author: targos

Diff for: common.gypi

@@ -470,7 +470,7 @@
       }],
       [ 'OS in "linux freebsd openbsd solaris android aix os400 cloudabi"', {
         'cflags': [ '-Wall', '-Wextra', '-Wno-unused-parameter', ],
-        'cflags_cc': [ '-fno-rtti', '-fno-exceptions', '-std=gnu++17' ],
+        'cflags_cc': [ '-fno-rtti', '-fno-exceptions', '-std=gnu++20' ],
         'defines': [ '__STDC_FORMAT_MACROS' ],
         'ldflags': [ '-rdynamic' ],
         'target_conditions': [
@@ -638,7 +638,7 @@
           ['clang==1', {
             'xcode_settings': {
               'GCC_VERSION': 'com.apple.compilers.llvm.clang.1_0',
-              'CLANG_CXX_LANGUAGE_STANDARD': 'gnu++17',  # -std=gnu++17
+              'CLANG_CXX_LANGUAGE_STANDARD': 'gnu++20',  # -std=gnu++20
               'CLANG_CXX_LIBRARY': 'libc++',
             },
           }],