Lower upper bound on text to avoid libstdc++ compatibility issues on …

…older release platforms

matterhorn.cabal

@@ -178,7 +178,7 @@ library
                      , data-clist           >= 0.1.2   && < 0.2
                      , semigroups           >= 0.18    && < 0.20
                      , connection           >= 0.2     && < 0.4
-                     , text                 >= 1.2.5.0 && < 2.1
+                     , text                 >= 1.2.5.0 && < 2.0
                      , bytestring           >= 0.10    && < 0.12
                      , stm                  >= 2.4     && < 2.6
                      , config-ini           >= 0.2.2.0 && < 0.3