release 0.12

See #368, release log:

• 1d762fc by @yegor256: #368: double literal
• bbc10cf by @yegor256: #368: polished a bit
• f4d594b by @yegor256: #368: removed CharactersOf
• 687ac9e by @yegor256: #368: no more IOException for ...
• 76f33e9 by @yegor256: #368: some renaming and ctors ...
• 45670f8 by @yegor256: #368: moved scalars to their o...
• 9c21f82 by @yegor256: #368 classes moved
• 9706ff8 by @ixmanuel: Hidden non-api objects. Refact...
• 83342d2 by @ixmanuel: Packages iterator, iterable. R...
• e3ab47e by @ixmanuel: End of endless renaming and re...
• e3d7317 by @ixmanuel: Make private main ctor. for Co...
• 341c351 by @ixmanuel: End of endless renaming and re...
• a61b786 by @ixmanuel: JoinedOf
• 1b9a80e by @ixmanuel: ReversedOf
• e931385 by @ixmanuel: SubOf
• 7e5f953 by @ixmanuel: ResourceOf, ItemAt
• d95e054 by @ixmanuel: Count, (Repeated/Endless)Item,...
• c97ad36 by @ixmanuel: CountOf and PropertiesOf
• b693036 by @ixmanuel: CountOf - Added count of Bytes
• 52d7656 by @ixmanuel: CountOf - Text, Iterable, Iter...
• and 11 more...

Released by Rultor 1.66.1, see build log