Moved ancillary files to extras/ (fixes #1011)

extras/tests/JsonArray/CMakeLists.txt

@@ -0,0 +1,23 @@
+# ArduinoJson - arduinojson.org
+# Copyright Benoit Blanchon 2014-2019
+# MIT License
+
+add_executable(JsonArrayTests 
+	add.cpp
+	copyArray.cpp
+	createNested.cpp
+	equals.cpp
+	get.cpp
+	isNull.cpp
+	iterator.cpp
+	memoryUsage.cpp
+	nesting.cpp
+	remove.cpp
+	size.cpp
+	std_string.cpp
+	subscript.cpp
+	undefined.cpp
+)
+
+target_link_libraries(JsonArrayTests catch)
+add_test(JsonArray JsonArrayTests)