update to crystal-db ~> 0.3.1

shard.yml

@@ -4,7 +4,7 @@ version: 0.8.0
 dependencies:
   db:
     github: crystal-lang/crystal-db
-    version: ~> 0.3.0
+    version: ~> 0.3.1
 
 authors:
   - Ary Borenszweig <aborenszweig@manas.com.ar>

src/sqlite3/connection.cr

@@ -4,6 +4,8 @@ class SQLite3::Connection < DB::Connection
     filename = self.class.filename(database.uri)
     # TODO maybe enable Flag::URI to parse query string in the uri as additional flags
     check LibSQLite3.open_v2(filename, out @db, (Flag::READWRITE | Flag::CREATE), nil)
+  rescue
+    raise DB::ConnectionRefused.new
   end
 
   def self.filename(uri : URI)