Resolve "Timeout value defaults should be `0`"

Closes #14 (closed)

Timeout value default should be 0, or should be mandatory. I opt for 0 (meaning no timeout), because that is the default timeout value of psycopg2 anyway.

\approve @ds @tara @gislars

databaselib/database.py

@@ -184,7 +184,7 @@ class PostGISDatabase(AbstractDatabase):
             Username for the database connection.
         password (str):
             Password for the database connection.
-        timeout (int, optional, default: None):
+        timeout (int, optional, default: 0):
             Timeout for SQL queries in milliseconds.
         itersize (int, optional, default: 10000):
             Number of rows fetched from the server at one call.
@@ -211,7 +211,7 @@ class PostGISDatabase(AbstractDatabase):
     """
 
     def __init__(
-        self, host, dbname, port, username, password, timeout: int = None, itersize: int = 10000
+        self, host, dbname, port, username, password, timeout: int = 0, itersize: int = 10000
     ):
         super().__init__()
         self.host = host
@@ -219,7 +219,7 @@ class PostGISDatabase(AbstractDatabase):
         self.port = port
         self.username = username
         self.password = password
-        self.timeout = int(timeout) if timeout is not None else None
+        self.timeout = int(timeout)
         self.itersize = int(itersize)
 
     def connect(self, timeout: int = None):