implemented PSR3

[Jurj-Bogdan]

#67

[arhimede]

@alexmerlin why we created the branch 4.1 and not branch 5 ?

[alexmerlin]

@alexmerlin why we created the branch 4.1 and not branch 5 ?

@arhimede When we removed laminas-log, we created branch 4.0.

Next, we upgraded laminas-servicemanager to 4.x (which introduced a BC break).
This would have required another major release but it was too soon to jump from 4.0 directly to 5.0.

So, we introduced an intermediary 4.1 "hack" both in dot-log and dot-errorhandler.
The hack makes:

• dot-errorhandler <4.1 compatible with dot-log <4.1
• dot-errorhandler >=4.1 compatible with dot-log >=4.1

See your comment:

No need for version 5, we can merge in 4

Maybe you still have a tab somewhere in Notepad explaining us this idea a couple of days ago...