Release 0.3.0

See #22, release log:

• 949d338 by @dgroup: #21: Add org.cactoos.Text to P...
• c56cfb1 by @dgroup: #20: Rename Resource to `Tem...
• 12159d5 by @dgroup: #19: Actualize the javadoc for...
• c802869 by @dgroup: #18: Close the IO resource(s) ...
• b20343d by @dgroup: #13: Define the new tasks for ...

Released by Rultor 1.68.1, see build log