Adjust Travis’s config

Author: IvanUkhov

.travis.yml

@@ -8,6 +8,7 @@ rust:
   - stable
 
 script:
+  - if [ "$TRAVIS_OS_NAME" = 'osx' ]; then export CC=gcc-9 FC=gfortran-9 LIBRARY_PATH=/usr/local/opt/gcc/lib/gcc/9; fi
   - cargo test -vv
 
 addons: