Bump the doctest dependency.

diff --git a/numerical-analysis.cabal b/numerical-analysis.cabal
index 995395de97a683f4384b3329e74d50e761e64a47..28eba57849a80137889ff230e9b12b4ec7f58771 100644 (file)
--- a/numerical-analysis.cabal
+++ b/numerical-analysis.cabal
@@ -57,7 +57,7 @@ test-suite doctests
     base      == 4.5.*,
     numbers   == 3000.1.*,
     -- Additional test dependencies.
-    doctest   == 0.7.*
+    doctest   == 0.9.*
 
   -- It's not entirely clear to me why I have to reproduce all of this.
   ghc-options: