Chore(deps): Update simplejson requirement from <4 to <5

[dependabot]

Updates the requirements on simplejson to permit the latest version.

Release notes

Sourced from simplejson's releases.

v4.1.1

What's Changed

• Add Python 2.7 wheel builds for Windows platforms by @​etrepum in simplejson/simplejson#378

Full Changelog: simplejson/simplejson@v4.1.0...v4.1.1

Changelog

Sourced from simplejson's changelog.

Version 4.1.1 released 2026-04-24

• The build_wheels_py27 CI job now also builds Python 2.7 wheels for Windows AMD64 and Windows x86, joining the existing Py2.7 manylinux1 / manylinux2010 x86_64 wheels. This unblocks offline / --no-index installs on Py2.7-on-Windows (the original reporter's case), which previously had no matching binary wheel on PyPI, fell through to the sdist, and failed on the PEP 517 isolated-build step complaining that setuptools>=42 was not in the wheelhouse. simplejson/simplejson#377

Version 4.1.0 released 2026-04-22

• The C extension now accelerates encoding when indent= is set. Previously the encoder fell back to the pure-Python implementation whenever a non-None indent was passed; now the C encoder emits the newline-plus-indent prefix, the level-aware item separator, and the closing indent directly. A representative nested-dict workload benchmarks about 4-5x faster end-to-end, and the indent=0 and empty-container edge cases continue to match the Python output byte-for-byte.

• The C extension now emits PEP 678 exc.add_note() annotations on serialization failures, matching the pure-Python encoder. A chained error on {'a': [1, object(), 3]} produces the same three notes (when serializing object object, when serializing list item 1, when serializing dict item 'a') whether the speedups are loaded or not, so the add_note assertions in test_errors.py no longer need indent=2 to force the Python path.

Version 4.0.1 released 2026-04-18

• Skip uploading Pyodide/wasm wheels to PyPI, which rejects them with "unsupported platform tag 'pyodide_2024_0_wasm32'". The wheels are still built in CI and preserved as workflow artifacts. simplejson/simplejson#375

Version 4.0.0 released 2026-04-18

• simplejson 4 requires Python 2.7 or Python 3.8+. Older Python versions (2.5, 2.6, 3.0-3.7) are no longer supported. pip will not install simplejson 4 on unsupported versions.

• The C extension now uses heap types and per-module state instead of static types and global state. This is required for free-threading support and sub-interpreter isolation. The Python-level API is unchanged.

• Full support for Python 3.13+ free-threading (PEP 703). The C

... (truncated)

Commits

• 639b2ee Add Python 2.7 wheel builds for Windows platforms (#378)
• 0fd3185 Accelerate indented encoding in the C extension; release 4.1.0 (#376)
• 19b5f94 Exclude Pyodide wheels from PyPI uploads (#375)
• 1608c05 Use JSONDecodeError for out-of-range end indices in C scanstring (#374)
• 3bba179 Encoder parity fixes (for_json/_asdict) and TSan stress CI job (#373)
• 7b22d65 Error parity for the C and Python scanstring in surrogate and truncated strin...
• 825100a Release version 4.0.0: free-threading, CPython json parity, Python 2.7 fixes ...
• 0dbb9d8 C extension: dead code cleanup, fast paths for dict/list/string encoding, cor...
• e2e5f0b Add Python 3.13+ free-threading support to dict operations (#369)
• e817370 Fix free-threading (3.14t) crashes: heap types, unified per-module state, tem...
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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 34.83%. Comparing base (d5eacdd) to head (47a5b89).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #246   +/-   ##
=======================================
  Coverage   34.83%   34.83%           
=======================================
  Files          24       24           
  Lines        1358     1358           
=======================================
  Hits          473      473           
  Misses        885      885           

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