Bump preCICE version

_config.yml

@@ -247,7 +247,7 @@ subprojects:
 # We use these versions to centrally update links
 # and other version-specific information.
 # Note that Jekyll cuts off trailing zeros: https://stackoverflow.com/questions/37862167/trailing-zeros-in-jekyll-liquid
-precice_version: 2.5.0
+precice_version: 3.0.0
 calculix_version: "2.20"
 calculix_adapter_version: "2.20.0"