again fix travis

gcontini

2021-05-20 a240eee8141ebbc93b67875d4334738cde412539

 src/library/base/CMakeLists.txt

@@ -1,7 +1,7 @@
ADD_LIBRARY(base OBJECT
    EventRegistry.cpp
    StringUtils.cpp
    file_utils.cpp
    string_utils.cpp
    base64.cpp
    logger.cpp
)