Update building of examples for static lib

examples/010-TestCase.cpp

@@ -1,8 +1,9 @@
 // 010-TestCase.cpp
 
 // Let Catch provide main():
-#define CATCH_CONFIG_MAIN
+#include <catch2/catch_default_main.hpp>
 
+// And write tests in the same file:
 #include <catch2/catch.hpp>
 
 int Factorial( int number ) {