retry.cabal: allow exceptions-0.6 and hspec-1.10 in tests

Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
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Test monoid laws for RetryPolicy
Filter out invalid policies from monoid tests
Add capDelay combinator
Merge pull request #11 from guillaume-nargeot/master

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Merge pull request #10 from trofi/master

retry.cabal: allow exceptions-0.6 and hspec-1.10 in tests
test: Add a test case to check the masking state in recovering
Add another test case which checks if async exceptions are masked in exeption handlers
Fix recovering to not mask async exceptions in a recovered action