Add the StrictBinaryUTF8 and DeleteDeprecatedFunctions Meson options

JSON_StrictBinaryUTF8 (#5741) and JSON_DeleteDeprecatedFunctions (#5755)
arrived with develop but were missing from the Meson build and the
pkg-config file, so check_build_options failed. Both Meson options
default to false and add JSON_STRICT_BINARY_UTF8=1 and
JSON_DELETE_DEPRECATED_FUNCTIONS=1 to the dependency, the pkg-config
file, and the generated CMake target; CMake's pkg-config file now
carries both definitions too. The ci_meson_install job sets and checks
them in its non-default install.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

meson.build

@@ -39,6 +39,12 @@ endif
 if get_option('StrictNulHandling')
     json_defines += 'JSON_STRICT_NUL_HANDLING=1'
 endif
+if get_option('StrictBinaryUTF8')
+    json_defines += 'JSON_STRICT_BINARY_UTF8=1'
+endif
+if get_option('DeleteDeprecatedFunctions')
+    json_defines += 'JSON_DELETE_DEPRECATED_FUNCTIONS=1'
+endif
 
 cpp_args = []
 foreach define : json_defines