Update to Clojure 1.11.1 (#1039)

* Update Clojure to 1.11.1

* Update test assertion for "Tap already defined" error

Recent versions of Clojure changed to throw a CompilerException
if macroexpansion fails. The RuntimeException thrown by riemann.test/tap
is now the cause.

project.clj

@@ -9,7 +9,7 @@
  :maintainer {:email "[email protected]"}
  :dependencies [
  [org.clojure/algo.generic "0.1.2"]
- [org.clojure/clojure "1.9.0"]
+ [org.clojure/clojure "1.11.1"]
  [org.clojure/math.numeric-tower "0.0.4"]
  [org.clojure/tools.logging "1.2.1"]
  [org.clojure/tools.nrepl "0.2.13"]

test/riemann/test_test.clj

@@ -19,7 +19,7 @@
  (tap :bar prn)
  (tap :foo nil))))
  (catch RuntimeException e
- (.getMessage e)))]
+ (.getMessage (ex-cause e))))]
  (is (re-find #"Tap :foo \(.+?:\) already defined at :" err))))
 
 (deftest tap-captures-events