The bin/doctrine-dbal.php file is not an executable file. Adding them as a bin in composer.json means that any composer install will trigger changes in the source when using symlinks because of the chmod. This makes things a pain when installing from source.
Thus, there is no valid reason to add it. It is absolutely not necessary when using a composer install. The issue requesting it previously is actually an issue in Laravel which replaces the proxy file/symlink generated by Composer with a copy of the original file, which of course cannot work because of paths used in require. But copying a second file does not help for that (unless in very specific cases). It only moves the issue until the next require call.

Fix incorrect docblock in Connection.php

These events don't exist.

Fix for bad profiling data, showing an indefinitely long query

Fix DISTINCT queries with limit and no order on SQL Server 2012

Readme: nicer badges; cleanup, 2.3- dropped

Add a unit-test to verify that when statements throw exceptions, the logger still has stopQuery called.

allow hhvm/mysqli failure so poor travis can feel better

Ref https://github.com/doctrine/doctrine2/pull/1362

Is there any reason why coverage is not in here? Would be much more useful than dependency badge.

Add postgresql 9.4 for travis builds

rehashed charset option implementation to support old and new versions of postgresql, and pgbouncer

fix client_encoding setting to support pgbouncer

Fixed a minor typo

Fix for inconsistent use of getSQLDeclaration

Fixed inconsistent use of getSQLDeclaration method

Fixed inconsistent use of getSQLDeclaration method

Fixed inconsistent use of getSQLDeclaration method

Fixed inconsistent use of getSQLDeclaration method

Fixed inconsistent use of getSQLDeclaration method

Fixed inconsistent use of getSqlDeclaration method name

Remove unneeded connect calls

travis: PHP 7.0 nightly added

Fix broken functional test for SQL server

Fix removing autoincrement column from a primary key