use local library source instead to correct some black-box issue for aliyuniot

lib/ArduinoJson/extras/tests/MemberProxy/CMakeLists.txt

@@ -0,0 +1,17 @@
+# ArduinoJson - arduinojson.org
+# Copyright Benoit Blanchon 2014-2020
+# MIT License
+
+add_executable(MemberProxyTests
+	add.cpp
+	clear.cpp
+	compare.cpp
+	containsKey.cpp
+	remove.cpp
+	set.cpp
+	size.cpp
+	subscript.cpp
+)
+
+target_link_libraries(MemberProxyTests catch)
+add_test(MemberProxy MemberProxyTests)