add gradle version

gradle.properties

@@ -7,6 +7,7 @@ logbackVersion = 1.2.3
 mnOpenAPIVersion = 1.4.0
 mnVersion = 1.3.2
 netcdfVersion = 5.1.0
+nshmpLibVersion = 1.0.1
 shadowVersion = 5.2.0
 slfVersion = 1.7.30
 spotbugsVersion = 4.2.4