PostgreSQL fixes

Errors were not correctly throwing exceptions

For the sake of SQLite compatibility booleans should be bound as
integers in PDO

lib/Db/PDOStatement.php

@@ -15,7 +15,7 @@ class PDOStatement extends AbstractStatement {
         "datetime"  => \PDO::PARAM_STR,
         "binary"    => \PDO::PARAM_LOB,
         "string"    => \PDO::PARAM_STR,
-        "boolean"   => \PDO::PARAM_BOOL,
+        "boolean"   => \PDO::PARAM_INT, // FIXME: using \PDO::PARAM_BOOL leads to incompatibilities with versions of SQLite bundled prior to PHP 7.3
     ];
 
     protected $st;

lib/Db/PostgreSQL/PDODriver.php

@@ -22,7 +22,7 @@ class PDODriver extends Driver {
 
     protected function makeConnection(string $user, string $pass, string $db, string $host, int $port, string $service) {
         $dsn = $this->makeconnectionString(true, $user, $pass, $db, $host, $port, $service);
-        $this->db = new \PDO("pgsql:$dsn", $user, $pass);
+        $this->db = new \PDO("pgsql:$dsn", $user, $pass, [\PDO::ATTR_ERRMODE => \PDO::ERRMODE_EXCEPTION]);
     }
 
     public function __destruct() {