fix: Travis CI failed to run Conan package manager

CMakeLists.txt

@@ -93,7 +93,7 @@ if(UNIX)
   include(GNUInstallDirs)
   set(ARGTABLE3_INSTALL_LIBDIR ${CMAKE_INSTALL_LIBDIR})
   set(ARGTABLE3_INSTALL_INCLUDEDIR ${CMAKE_INSTALL_INCLUDEDIR})
-  set(ARGTABLE3_INSTALL_CMAKEDIR ${ARGTABLE3_LIBDIR}/cmake)
+  set(ARGTABLE3_INSTALL_CMAKEDIR ${CMAKE_INSTALL_LIBDIR}/cmake)
 elseif(WIN32)
   set(ARGTABLE3_INSTALL_LIBDIR "lib")
   set(ARGTABLE3_INSTALL_INCLUDEDIR "include")

test_package/CMakeLists.txt

@@ -38,7 +38,8 @@ conan_basic_setup()
 enable_testing()
 
 if (CONAN_SETTINGS_OS)
-  find_package(argtable3 REQUIRED)
+  set(Argtable3_DIR ${CONAN_LIB_DIRS_ARGTABLE3}/cmake)
+  find_package(Argtable3 REQUIRED)
   add_executable(${PROJECT_NAME} testargtable3.c)
   target_link_libraries(${PROJECT_NAME} PUBLIC argtable3)
   add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD