⬆️🐍 Update dependency ty to v0.0.21 (#812)

This PR contains the following updates:

| Package | Change |
[Age](https://docs.renovatebot.com/merge-confidence/) |
[Confidence](https://docs.renovatebot.com/merge-confidence/) |
|---|---|---|---|
| [ty](https://redirect.github.com/astral-sh/ty)
([changelog](https://redirect.github.com/astral-sh/ty/blob/main/CHANGELOG.md))
| `==0.0.20` → `==0.0.21` |
![age](https://developer.mend.io/api/mc/badges/age/pypi/ty/0.0.21?slim=true)
|
![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/ty/0.0.20/0.0.21?slim=true)
|

---

### Release Notes

<details>
<summary>astral-sh/ty (ty)</summary>

###
[`v0.0.21`](https://redirect.github.com/astral-sh/ty/blob/HEAD/CHANGELOG.md#0021)

[Compare
Source](https://redirect.github.com/astral-sh/ty/compare/0.0.20...0.0.21)

Released on 2026-03-05.

##### Bug fixes

- Avoid stack overflow with recursive typevar
([#&#8203;23652](https://redirect.github.com/astral-sh/ruff/pull/23652))
- Fix panic on incomplete except handlers
([#&#8203;23708](https://redirect.github.com/astral-sh/ruff/pull/23708))
- Allow unions of different-length iterables in `*args` unpacking into
optional positional parameters
([#&#8203;23124](https://redirect.github.com/astral-sh/ruff/pull/23124))
- Don't replace `Any` attributes with `object` after `isinstance`
narrowing
([#&#8203;23725](https://redirect.github.com/astral-sh/ruff/pull/23725))

##### LSP server

- Exclude decorators from class/def code folding
([#&#8203;23543](https://redirect.github.com/astral-sh/ruff/pull/23543))
- Fix handling of non-Python text documents
([#&#8203;23704](https://redirect.github.com/astral-sh/ruff/pull/23704))

##### Configuration

- Add `all` selector to `ty.json` schema
([#&#8203;23721](https://redirect.github.com/astral-sh/ruff/pull/23721))
- Fix precedence of `all` selector in TOML configurations
([#&#8203;23723](https://redirect.github.com/astral-sh/ruff/pull/23723))
- Make `all` selector case-sensitive
([#&#8203;23713](https://redirect.github.com/astral-sh/ruff/pull/23713))

##### Type checking

- Add `invalid-enum-member-annotation` lint rule
([#&#8203;23648](https://redirect.github.com/astral-sh/ruff/pull/23648))
- Add a diagnostic for an unused awaitable
([#&#8203;23650](https://redirect.github.com/astral-sh/ruff/pull/23650))
- Add a diagnostic if a `TypeVar` is used to specialize a `ParamSpec`,
or vice versa
([#&#8203;23738](https://redirect.github.com/astral-sh/ruff/pull/23738))
- Add more type-variable default validation
([#&#8203;23639](https://redirect.github.com/astral-sh/ruff/pull/23639))
- Add unbound type variable detection in annotations
([#&#8203;23641](https://redirect.github.com/astral-sh/ruff/pull/23641))
- Apply narrowing to walrus values
([#&#8203;23687](https://redirect.github.com/astral-sh/ruff/pull/23687))
- Do not union `Unknown` into unannotated container types
([#&#8203;23718](https://redirect.github.com/astral-sh/ruff/pull/23718))
- Avoid inferring generics with negative intersections
([#&#8203;23750](https://redirect.github.com/astral-sh/ruff/pull/23750))
- More precise types for `name` and `value` of an enum
([#&#8203;23683](https://redirect.github.com/astral-sh/ruff/pull/23683))
- Better preserve user-provided union order in inferred specializations
([#&#8203;23715](https://redirect.github.com/astral-sh/ruff/pull/23715))
- Support narrowing in ternary expressions
([#&#8203;23726](https://redirect.github.com/astral-sh/ruff/pull/23726))
- Validate bare ParamSpec usage in type annotations, and support
stringified ParamSpecs as the first argument to `Callable`
([#&#8203;23625](https://redirect.github.com/astral-sh/ruff/pull/23625))

##### Contributors

- [@&#8203;charliermarsh](https://redirect.github.com/charliermarsh)
- [@&#8203;zsol](https://redirect.github.com/zsol)
- [@&#8203;Gankra](https://redirect.github.com/Gankra)
- [@&#8203;MichaReiser](https://redirect.github.com/MichaReiser)
- [@&#8203;AlexWaygood](https://redirect.github.com/AlexWaygood)
- [@&#8203;rizzip](https://redirect.github.com/rizzip)
- [@&#8203;iksuddle](https://redirect.github.com/iksuddle)
- [@&#8203;dcreager](https://redirect.github.com/dcreager)
- [@&#8203;BurntSushi](https://redirect.github.com/BurntSushi)
- [@&#8203;carljm](https://redirect.github.com/carljm)
- [@&#8203;oconnor663](https://redirect.github.com/oconnor663)

</details>

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pyproject.toml

@@ -371,5 +371,5 @@ dev = [
   {include-group = "build"},
   {include-group = "test"},
   "nox>=2025.11.12",
-  "ty==0.0.20",
+  "ty==0.0.21",
 ]

python/mqt/ddsim/primitives/sampler.py

@@ -10,7 +10,7 @@
 
 from __future__ import annotations
 
-from typing import TYPE_CHECKING
+from typing import TYPE_CHECKING, cast
 
 import numpy as np
 from mqt.core import load
@@ -28,7 +28,7 @@
 from mqt.ddsim.pyddsim import CircuitSimulator
 
 if TYPE_CHECKING:
-    from collections.abc import Iterable
+    from collections.abc import Iterable, Mapping
 
     from qiskit.circuit import ClassicalRegister
     from qiskit.primitives.containers import SamplerPubLike
@@ -134,7 +134,10 @@ def _get_bit_arrays(
                 }
                 for count in counts
             ]
-            bit_arrays[creg.name] = BitArray.from_counts(creg_counts, creg.size)
+            bit_arrays[creg.name] = BitArray.from_counts(
+                counts=cast("Iterable[Mapping[str | int, int]]", creg_counts),
+                num_bits=creg.size,
+            )
             start_index -= creg.size
 
         return bit_arrays