dev env: re-add "tomli" to fix pipeline

https://github.com/fphammerle/free-disk/commit/fa3e5f960fb12eb522b325cba291cc1a4e3d3973
https://github.com/fphammerle/free-disk/commit/2ee70331880ecfd09460c2201033cd595146b9fc
https://github.com/fphammerle/free-disk/commit/4ebe0aa97fca1971d37c876169df50073a06ace0

Pipfile

@@ -23,6 +23,10 @@ typing-extensions = "*"
 # >     from exceptiongroup import BaseExceptionGroup
 # > ModuleNotFoundError: No module named 'exceptiongroup'
 exceptiongroup = {markers = "python_version < '3.11'"}
+# >   File "[...]/lib/python3.10/site-packages/_pytest/config/findpaths.py", line 71, in load_config_dict_from_file
+# >     import tomli as tomllib
+# > ModuleNotFoundError: No module named 'tomli'
+tomli = {markers = "python_version < '3.11'"}
 # >   File "[...]/lib/python3.10/site-packages/astroid/decorators.py", line 16, in <module>
 # >     import wrapt
 # > ModuleNotFoundError: No module named 'wrapt'

Pipfile.lock

@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "bbbd3ab9c04f158ddd862310bf81b148f6b371885d42a346499ee3f8873eb301"
+            "sha256": "04f04b3e01641231dd3be0d0b26777c913d450cdf81eb9a2597649acef7ef80a"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -341,6 +341,14 @@
             "markers": "python_version >= '3.7'",
             "version": "==68.0.0"
         },
+        "tomli": {
+            "hashes": [
+                "sha256:939de3e7a6161af0c887ef91b7d41a53e7c5a1ca976325f429cb46ea9bc30ecc",
+                "sha256:de526c12914f0c550d15924c62d72abc48d6fe7364aa87328337a31007fe8a4f"
+            ],
+            "markers": "python_version < '3.11'",
+            "version": "==2.0.1"
+        },
         "tomlkit": {
             "hashes": [
                 "sha256:38e1ff8edb991273ec9f6181244a6a391ac30e9f5098e7535640ea6be97a7c86",