F fix types for py3.8

Summary

For https://gitlab.indiscale.com/caosdb/customers/leibniz-zmt/management/-/issues/81. This is a fix for https://gitlab.com/caosdb/caosdb-pylib/-/issues/64.

Focus

Just uses Dict and List from typing.

Test Environment

Install a python3.8 interpreter and run tox.

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• All automated tests pass
• Up-to-date CHANGELOG.md (or not necessary)
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src/caosdb/utils/plantuml.py

@@ -39,7 +39,7 @@ import shutil
 import caosdb as db
 from caosdb.common.datatype import is_reference, get_referenced_recordtype
 
-from typing import Optional
+from typing import List, Optional
 
 import tempfile
 
@@ -341,9 +341,9 @@ def retrieve_substructure(start_record_types, depth, result_id_set=None, result_
     return None
 
 
-def to_graphics(recordtypes: list[db.Entity], filename: str,
+def to_graphics(recordtypes: List[db.Entity], filename: str,
                 output_dirname: Optional[str] = None,
-                formats: list[str] = ["tsvg"],
+                formats: List[str] = ["tsvg"],
                 silent: bool = True,
                 add_properties: bool = True,
                 add_recordtypes: bool = True,
@@ -367,7 +367,7 @@ def to_graphics(recordtypes: list[db.Entity], filename: str,
                      the destination directory for the resulting images as defined by the "-o"
                      option by plantuml
                      default is to use current working dir
-    formats : list[str]
+    formats : List[str]
               list of target formats as defined by the -t"..." options by plantuml, e.g. "tsvg"
     silent : bool
              Don't output messages.