Adjust timeouts to a sane cutoff

test/jiffy_10_short_double_tests.erl

@@ -14,7 +14,7 @@ filename() -> "../test/cases/short-doubles.txt".
 
 short_double_test() ->
     {ok, Fd} = file:open(filename(), [read, binary, raw]),
-    {"all doubles round trip", ?assertEqual(0, run(Fd, 0))}.
+    {"all doubles round trip", {timeout, 300, ?assertEqual(0, run(Fd, 0))}}.
 
 
 run(Fd, Acc) ->

test/jiffy_11_proper_tests.erl

@@ -17,17 +17,17 @@ opts() ->
 
 run(Name) ->
     {msg("~s", [Name]), [
-        {timeout, 3600, ?_assert(proper:quickcheck(?MODULE:Name(), opts()))}
+        {timeout, 300, ?_assert(proper:quickcheck(?MODULE:Name(), opts()))}
     ]}.
 
 proper_encode_decode_test_() ->
-    {timeout, 3600, [
+    [
         run(prop_enc_dec),
         run(prop_enc_dec_pretty),
         run(prop_enc_no_crash),
         run(prop_dec_no_crash_bin),
         run(prop_dec_no_crash_any)
-    ]}.
+    ].
 
 prop_enc_dec() ->
     ?FORALL(Data, json(),