pipenv: Recent versions fail setup with "AttributeError: 'String' object has no attribute 'update'"

Issue description

Using github CI, with the latest version v2023.9.7 (and recent versions?), our ci is failing during environment setup/installation with “AttributeError: ‘String’ object has no attribute ‘update’”.

Our requirements setup:

	pip install pip --upgrade
	pip install "pipenv>2021.11.15"

	pipenv lock
	pipenv sync --dev

Updating the pipenv installation to ‘pip install “pipenv>2021.11.15,<2023.8.19”’ resolves the issue and allows installation to proceed.

Expected result

Installation succeeds.

Actual result

Run source .venv/bin/activate && make requirements && python setup.py install
  source .venv/bin/activate && make requirements && python setup.py install
  shell: /usr/bin/bash -e {0}
  env:
    pythonLocation: /opt/hostedtoolcache/Python/3.7.17/x64
    PKG_CONFIG_PATH: /opt/hostedtoolcache/Python/3.7.17/x64/lib/pkgconfig
    Python_ROOT_DIR: /opt/hostedtoolcache/Python/3.7.17/x64
    Python[2](https://github.com/zappa/Zappa/actions/runs/6116185784/job/16601008295#step:8:2)_ROOT_DIR: /opt/hostedtoolcache/Python/[3](https://github.com/zappa/Zappa/actions/runs/6116185784/job/16601008295#step:8:3).7.17/x6[4](https://github.com/zappa/Zappa/actions/runs/6116185784/job/16601008295#step:8:4)
    Python3_ROOT_DIR: /opt/hostedtoolcache/Python/3.7.17/x64
    LD_LIBRARY_PATH: /opt/hostedtoolcache/Python/3.7.17/x64/lib
pip install pip --upgrade
Requirement already satisfied: pip in ./.venv/lib/python3.7/site-packages (23.0.1)
Collecting pip
  Using cached pip-23.2.1-py3-none-any.whl (2.1 MB)
Installing collected packages: pip
  Attempting uninstall: pip
    Found existing installation: pip 23.0.1
    Uninstalling pip-23.0.1:
      Successfully uninstalled pip-23.0.1
Successfully installed pip-23.2.1
pip install pipenv>2021.11.1[5](https://github.com/zappa/Zappa/actions/runs/6116185784/job/16601008295#step:8:5)
pipenv lock
Courtesy Notice: Pipenv found itself running within a virtual environment, so it will automatically use that environment, instead of creating its own for any project. You can set PIPENV_IGNORE_VIRTUALENVS=1 to force pipenv to ignore that environment and create its own instead. You can set PIPENV_VERBOSITY=-1 to suppress this warning.
Locking [packages] dependencies...
Building requirements...
Resolving dependencies...
Success!
Traceback (most recent call last):
  File "/home/runner/work/Zappa/Zappa/.venv/bin/pipenv", line 8, in <module>
    sys.exit(cli())
  File "/home/runner/work/Zappa/Zappa/.venv/lib/python3.7/site-packages/pipenv/vendor/click/core.py", line 1130, in __call__
    return self.main(*args, **kwargs)
  File "/home/runner/work/Zappa/Zappa/.venv/lib/python3.7/site-packages/pipenv/cli/options.py", line 58, in main
    return super().main(*args, **kwargs, windows_expand_args=False)
  File "/home/runner/work/Zappa/Zappa/.venv/lib/python3.7/site-packages/pipenv/vendor/click/core.py", line 1055, in main
    rv = self.invoke(ctx)
  File "/home/runner/work/Zappa/Zappa/.venv/lib/python3.7/site-packages/pipenv/vendor/click/core.py", line 1657, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/home/runner/work/Zappa/Zappa/.venv/lib/python3.7/site-packages/pipenv/vendor/click/core.py", line 1404, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/home/runner/work/Zappa/Zappa/.venv/lib/python3.7/site-packages/pipenv/vendor/click/core.py", line 760, in invoke
    return __callback(*args, **kwargs)
  File "/home/runner/work/Zappa/Zappa/.venv/lib/python3.7/site-packages/pipenv/vendor/click/decorators.py", line 84, in new_func
    return ctx.invoke(f, obj, *args, **kwargs)
  File "/home/runner/work/Zappa/Zappa/.venv/lib/python3.7/site-packages/pipenv/vendor/click/core.py", line 760, in invoke
    return __callback(*args, **kwargs)
  File "/home/runner/work/Zappa/Zappa/.venv/lib/python3.7/site-packages/pipenv/vendor/click/decorators.py", line 26, in new_func
    return f(get_current_context(), *args, **kwargs)
  File "/home/runner/work/Zappa/Zappa/.venv/lib/python3.7/site-packages/pipenv/cli/command.py", line 346, in lock
    categories=state.installstate.categories,
  File "/home/runner/work/Zappa/Zappa/.venv/lib/python3.7/site-packages/pipenv/routines/lock.py", line 76, in do_lock
    old_lock_data=old_lock_data,
  File "/home/runner/work/Zappa/Zappa/.venv/lib/python3.7/site-packages/pipenv/utils/resolver.py", line 865, in venv_resolve_deps
    project, results, pipfile, lockfile[lockfile_section], old_lock_data
  File "/home/runner/work/Zappa/Zappa/.venv/lib/python3.7/site-packages/pipenv/utils/locking.py", line 140, in prepare_lockfile
    lockfile_entry = get_locked_dep(project, dep, pipfile, current_entry)
  File "/home/runner/work/Zappa/Zappa/.venv/lib/python3.7/site-packages/pipenv/utils/locking.py", line 123, in get_locked_dep
    lockfile_entry = clean_resolved_dep(project, dep, is_top_level, current_entry)
  File "/home/runner/work/Zappa/Zappa/.venv/lib/python3.7/site-packages/pipenv/utils/dependencies.py", line 300, in clean_resolved_dep
    current_entry.update(lockfile)
AttributeError: 'String' object has no attribute 'update'

Steps to replicate

Running in github CI:

jobs:
  test:
    runs-on: ubuntu-20.04
    strategy:
      matrix:
        python: [3.7, 3.8, 3.9, "3.10", "3.11"]
    steps:
      - name: Checkout Code Repository
        uses: actions/checkout@v3
      - name: Set up Python ${{ matrix.python }}
        uses: actions/setup-python@v4
        with:
          python-version: ${{ matrix.python }}
      - uses: actions/cache@v3
        with:
          path: ~/.cache/pip
          key: ${{ runner.os }}-pip${{ matrix.python }}-${{ hashFiles('Pipfile') }}
          restore-keys: ${{ runner.os }}-pip${{ matrix.python }}-
      - name: make sure we have version tags
        run: git fetch --unshallow --tags
      - name: Setup Virtualenv
        run: python -m venv .venv
      - name: Install
        run: source .venv/bin/activate && make requirements && python setup.py install

Fails during “make requirements”.

requirements section of Makefile:

requirements:
	pip install pipenv>2021.11.15
	pipenv lock
	pipenv sync --dev