Make MkIssue create events when opened/closed

See also #1073 and build log

Fix #1057 and add unit test

See #1058, release log:

• 7a7075c by @rultor: Merge remote branch 'fork/fix-...
• b412e8a by @cvrebert: Fix #1057 and add unit test
• 02d1b1b by @rultor: Merge remote branch 'fork/Retr...
• 88f2d76 by @cvrebert: Add RetryCarefulWire [= RetryW...
• 9f0648b by @cvrebert: Make CarefulWire tolerate the ...
• f58fe13 by @cvrebert: fix CarefulWire ctor JavaDoc t...
• f82d86b by @rultor: Merge remote branch 'fork/patc...

Released by Rultor 1.52.3, see build log

Issue$Smart.hasBody()

See also #1038 and build log

Missing issue event types

See also #1024 and build log

MkCommitsComparison must return empty list of commits

See #1019, release log:

• 8f1aebb by @yegor256: #1019 MkCommitsComparison returns empty list of commits

Released by Rultor 1.49.6, see build log

MkCommitsComparison doesn't show commits

See #1018, release log:

• 888aacd by @yegor256: #1018 MkCommitComparison fixed
• 21d88f5 by @yegor256: #1018 reproduced bug in MkCommitComparison
• 30da341 by @yegor256: parent 1.17
• 7a7bd2e by @yegor256: #825 puzzle removed

Released by Rultor 1.49.6, see build log

updated website code sample

See also #1016 and build log

Release.Smart#hasTag()

See #1015, release log:

• 6aa7b74 by @yegor256: #1015 Release.Smart.hasTag()

Released by Rultor 1.49.2, see build log

Release.Smart#hasBody()

See #1014, release log:

• cef2f07 by @yegor256: #1014 Release.Smart#hasBody()
• eb32d35 by @yegor256: typo
• 30fde16 by @yegor256: toString for MkIssue
• 6fe2806 by @rultor: Merge remote branch 'fork/#989'
• e051392 by @rultor: Merge remote branch 'fork/#997'
• 9d49e08 by @cyberone: Merge branch 'master' into #989
• 2f43348 by @cyberone: Removed redundant exception
• 5125ea2 by @cyberone: Exception rewrite

Released by Rultor 1.49.1, see build log

Issue.Smart.assignee() crashes

See #1012, release log:

• 85462f1 by @null: #1012 Issue.Smart#hasAssignee()
• 86ba730 by @null: Merge remote branch 'fork/jcabi-github-913'

Released by Rultor 2.0-SNAPSHOT, see build log