add symfony 7.x

add symfony 6.x

update doctrine annotation to 1.10 due to error in parsing short php doc

allow symfony 5.x

Merge pull request #21 from klatys/configurable-datetime

fix indentation

add symfony 4.0 as allowed dependency

allow changing empty datetime value

add conversion (was missing)

fix indentation

Add configurable datetime object support. Bump nette php-generator version. Drop php5.4 and php5.5 support, add php7.1 tests

Update deprecated addDocument to addComment

Merge pull request #13 from jakubkulhan/feature-fields

fields - composite set of fields/properties

Merge pull request #12 from Zemistr/patch-1