chore: Update release artifacts

1. Add jvm main class to use as fallback for coursier if platform is not supported
2. Fix fish completions to not show errors, otherwise they would show up every time `bloop autocomplete` is run outside a directory with .bloop available.

etc/bloop-coursier.json

@@ -8,6 +8,7 @@
   "launcherType": "graalvm-native-image",
   "prebuilt": "$PREBUILT",
   "dependencies": [
-    "ch.epfl.scala:bloop-cli_2.13:$VERSION"
-  ]
-}
+    "ch.epfl.scala::bloop-cli:$VERSION"
+  ],
+  "mainClass": "bloop.cli.Bloop"
+}

etc/fish-completions

@@ -15,27 +15,27 @@ function _boolean
 end
 
 function _reporters
-    bloop autocomplete --format fish --mode reporters
+    bloop autocomplete --format fish --mode reporters 2> /dev/null
 end
 
 function _protocols
-    bloop autocomplete --format fish --mode protocols
+    bloop autocomplete --format fish --mode protocols 2> /dev/null
 end
 
 function _testsfqcn
     set -l cmd (commandline -poc)
     set -e cmd[1]
     set -l project $cmd[2]
     if test -n "$project"
-        bloop autocomplete --format fish --mode testsfqcn --project $project
+        bloop autocomplete --format fish --mode testsfqcn --project $project 2> /dev/null
     end
 end
 
 function _mainsfqcn
     set -l cmd (commandline -poc)
     set -e cmd[1]
     set -l project $cmd[2]
-    bloop autocomplete --format fish --mode mainsfqcn --project $project
+    bloop autocomplete --format fish --mode mainsfqcn --project $project 2> /dev/null
 end
 
 function __assert_args_count -a count
@@ -73,7 +73,7 @@ function __fish_seen_subcommand_from_project_commands
 end
 
 function _flags_for_command -a cmd
-    bloop autocomplete --format fish --mode flags --command $cmd
+    bloop autocomplete --format fish --mode flags --command $cmd 2> /dev/null
 end
 
 function _is_project_command -a cmd