Fix Compat version for abstract type syntax

Chris Foster · Chris Foster · commit 336ca57206f5 · 2017-04-11T11:07:40.000+10:00
diff --git a/REQUIRE b/REQUIRE
@@ -1,4 +1,4 @@
 julia 0.5
-Compat 0.11.0
+Compat 0.17.0
 StaticArrays
 Rotations 0.3.0
