Default column expressions do not work on SQL Server

Removed the assertion which doesn't work with a user-provided PDO connection

Reworked driver exception tests

1. Got rid of hard-coded exception mocks in favor of PHPUnit-generated ones where possible.
2. Reworked AbstractDriverTest::testConvertsException() to use a data provider to make testing all types of exceptions independent.
3. Updated PHPUnit since the reworked code relies on sebastianbergmann/phpunit#3604.

Deprecate the public constants in SQLParserUtils

Deprecate SQLSrvStatement::LAST_INSERT_ID_SQL constant.

Improve ExceptionTest::testConnectionExceptionSqLite

on linux running as root.

Reworked SQL Server installer on Travis CI

Handle default values as values, not SQL expressions

Maintain platform parameter in connection params

Expand list of keywords in composer.json

using params in query cache key generation.

Extract constants for built-in types from Type to Types

Extract type factory and registry from Type into TypeRegistry

Enabled the build against IBM DB2 on PHP 7.3 on Travis CI

fix #3479 (typos in example-code in QueryBuilder)

fix two typos in QueryBuilder, on of them reported in #3479

Fix the branch alias for master

Version was bumped to 2.10-dev in 27023276 but the branch alias was forgotten.

Update doctrine coding standard from 5.0 to 6.0

Updated PHPStan to v0.11.3

Use latest stable versions of sqlsrv and pdo_sqlsrv on CI

See https://github.com/Microsoft/msphpsql/issues/955