Bump time upper bound to (< 1.7)

[imalsogreg]

Tested by running main from examples/whiskers.hs in a repl^* :

<rss version="2.0"> <channel> <title>my whiskers</title> <link>http://www.n-heptane.com</link> <description>they are very pointy and luxurious</description> <docs>http://www.rssboard.org/rss-specification</docs> <item> <title>yea-haw</title> <link>http://www.n-heptane.com/</link> <description>the best site ever!!!</description> <author>jeremy@n-heptane.com (Jeremy Shaw)</author> <category>meow</category> <enclosure url="http://www.n-heptane.com/newpics/alice.gif" length="7333" type="image/jpeg"/> <guid isPermaLink="true">whee babayyyy!</guid> <pubDate>Wed, 26 Oct 2016 00:09:48 UTC</pubDate> <source url="http://www.google.com/">The best search engine eva!</source> </item> </channel> </rss> 

Haha :)

^* Intented by hand

[basvandijk]

Thanks! Released as 3000.2.0.6.