DEV: Pin version for Discourse <3.5.0.beta1-dev (#91)

Author: davidtaylorhq

.discourse-compatibility

@@ -1,3 +1,4 @@
+< 3.5.0.beta1-dev: 54a7970fd9ae1609e453199aeba5fe582b5e3672
 < 3.4.0.beta2-dev: 1eef24bc58166e366a66676cae1990f9308b95e7
 < 3.4.0.beta1-dev: 0beedd0add742911ac8fa2969d74ca050c8d7417
 < 3.3.0.beta1-dev: 5a8b188613b41e5c0064528d2aefa3d6e32853d6