Problem: No tests for libzmq 4.2.0

Solution: add travis job with libzmq 4.2.0

Author: sigiesec

.travis.yml

@@ -19,6 +19,7 @@ env:
   matrix:
 #    - BUILD_TYPE=cmake DRAFT=enabled
     - BUILD_TYPE=cmake ZMQ_VERSION=4.2.5
+    - BUILD_TYPE=cmake ZMQ_VERSION=4.2.0
 
 matrix:
   include:

libzmq-pkg-config/FindZeroMQ.cmake

@@ -4,7 +4,7 @@ pkg_check_modules(PC_LIBZMQ QUIET libzmq)
 set(ZeroMQ_VERSION ${PC_LIBZMQ_VERSION})
 find_library(ZeroMQ_LIBRARY NAMES libzmq.so libzmq.dylib libzmq.dll
              PATHS ${PC_LIBZMQ_LIBDIR} ${PC_LIBZMQ_LIBRARY_DIRS})
-find_library(ZeroMQ_STATIC_LIBRARY NAMES libzmq.a libzmq.dll.a
+find_library(ZeroMQ_STATIC_LIBRARY NAMES libzmq-static.a libzmq.a libzmq.dll.a
              PATHS ${PC_LIBZMQ_LIBDIR} ${PC_LIBZMQ_LIBRARY_DIRS})
 
 if(ZeroMQ_LIBRARY AND ZeroMQ_STATIC_LIBRARY)