Release v1.5.4

Changes since v1.5.3
-----------------------
f1300b0 Reduce log-level during UTs to :error
b2e1da3 Ensure we close the output channel under error conditions
b2cf6c5 Re-enable cloverage (#54)

Signed-off-by: Greg Haskins <greg@manetu.com>

project.clj

@@ -1,4 +1,4 @@
-(defproject protojure "1.5.4-SNAPSHOT"
+(defproject protojure "1.5.4"
   :description "Support library for protoc-gen-clojure, providing native Clojure support for Google Protocol Buffers and GRPC applications"
   :url "http://github.com/protojure/library"
   :license {:name "Apache License 2.0"