Do not allow duplicates

Update tolerant parser 0.1 (#58)

Fix typo

Update deps

Upgrade PHPStan to 12

Handle case where no context class exists

Refactored to single v/o

Do not replace all references

We only want to replce the reference under the cursor - the point is
that the other name is already imported so replacing them all would
break everything.

Do not try and import self/static

updates php_cs dist