Expansion of test functionalities that appear to be frequently used while testing.

Changes for 2.0.1 - 2023-06-21T19:42:51Z

• If any of the variables $CLASS, $METHOD, $METHOD_REF, $TEMP_DIR, and $TEMP_FILE is undefined, it is not exported.
• Modules Test::Cmd, Test::Files, Test:😮utput, and Test::Warn are no longer loaded and their functions are not exported by Test::Expander.
• Unexpedted exceptions detected by "lives_ok" are logged to the screen using "diag".
• Options "-lib" and "-method" introduced.
• Option "-target" supports "undef" as value if no testee module should be loaded automatically.
• Names of functions and variables made more perlish.