Remove April caveat, add pre-release notice

The pipenv team hit their April and May release targets, so the caveat about the seeming impasse of pipenv development no longer applies. However, it may benefit the user to know that the early access version of the package is available as pre-release in `pip`.

Author: mavaddat

source/tutorials/managing-dependencies.rst

@@ -26,31 +26,6 @@ as Python libraries, should also consider the
 `poetry <https://github.com/python-poetry/poetry>`_ project as an alternative dependency
 management solution.
 
-
-Recommendation caveats (as of April 2020)
------------------------------------------
-
-While this tutorial covers the ``pipenv`` project as a tool that focuses
-primarily on the needs of Python application development rather than Python
-library development, the project itself is currently working through several
-`process and maintenance issues <https://github.com/pypa/pipenv/issues/3369>`_
-that are preventing bug fixes and new features from being published (with the
-entirety of 2019 passing without a new release).
-
-This means that in the near term, ``pipenv`` still suffers from several quirks
-and performance problems without a clear timeline for resolution of those isses.
-
-While this remains the case, project maintainers are likely to want to
-investigate :ref:`other-dependency-management-tools` for use instead of, or
-together with, ``pipenv``.
-
-Assuming the April 2020 ``pipenv`` release goes ahead as planned, and the
-release after that also remains on track, then this caveat on the tutorial will
-be removed. If those releases *don't* remain on track, then the tutorial itself
-will be removed, and replaced with a discussion page on the available dependency
-management options.
-
-
 Installing Pipenv
 -----------------
 
@@ -66,6 +41,12 @@ Use ``pip`` to install Pipenv:
 
     pip install --user pipenv
 
+At present, the `latest Pipenv <https://pypi.org/project/pipenv/#history>`_ is in pre-release stage after a long hiatus. If you run into a bug that `appears to be addressed <https://github.com/pypa/pipenv/releases/latest>`_ by the latest preview version, you may want to try installing the pre-release by specifying the version in `pip` as follows:
+
+.. code-block:: python
+
+    pip install pipenv==2020.4.1b2
+
 .. _pipenv-user-base:
 
 .. Note:: This does a `user installation`_ to prevent breaking any system-wide