README.md: mismatch with output from $ pipenv

[dqkqd]

Issue description

There are differences between output of $ pipenv and usage written in README.md.
For example Python version (3.9 and 3.7) in Usage Example.

--- from_readme
+++ from_cli
@@ -1,23 +1,33 @@
 Usage: pipenv [OPTIONS] COMMAND [ARGS]...
 
 Options:
-  --where          Output project home information.
-  --venv           Output virtualenv information.
-  --py             Output Python interpreter information.
-  --envs           Output Environment Variable options.
-  --rm             Remove the virtualenv.
-  --bare           Minimal output.
-  --man            Display manpage.
-  --three          Use Python 3 when creating virtualenv.
-  --python TEXT    Specify which version of Python virtualenv should use.
-  --site-packages  Enable site-packages for the virtualenv.
-  --version        Show the version and exit.
-  -h, --help       Show this message and exit.
+  --where                         Output project home information.
+  --venv                          Output virtualenv information.
+  --py                            Output Python interpreter information.
+  --envs                          Output Environment Variable options.
+  --rm                            Remove the virtualenv.
+  --bare                          Minimal output.
+  --man                           Display manpage.
+  --support                       Output diagnostic information for use in
+                                  GitHub issues.
+  --site-packages / --no-site-packages
+                                  Enable site-packages for the virtualenv.
+                                  [env var: PIPENV_SITE_PACKAGES]
+  --python TEXT                   Specify which version of Python virtualenv
+                                  should use.
+  --three                         Use Python 3 when creating virtualenv.
+  --clear                         Clears caches (pipenv, pip).  [env var:
+                                  PIPENV_CLEAR]
+  -q, --quiet                     Quiet mode.
+  -v, --verbose                   Verbose mode.
+  --pypi-mirror TEXT              Specify a PyPI mirror.
+  --version                       Show the version and exit.
+  -h, --help                      Show this message and exit.
 
 
 Usage Examples:
-   Create a new project using Python 3.9, specifically:
-   $ pipenv --python 3.9
+   Create a new project using Python 3.7, specifically:
+   $ pipenv --python 3.7
 
    Remove project virtualenv (inferred from current directory):
    $ pipenv --rm
@@ -40,23 +50,20 @@
    Use a lower-level pip command:
    $ pipenv run pip freeze
 
-   Generate a requirements.txt file (including dev):
-   $ pipenv requirements --dev > requirements.txt
-
 Commands:
-  check         Checks for security vulnerabilities and against PEP 508 markers
-                provided in Pipfile.
+  check         Checks for PyUp Safety security vulnerabilities and against
+                PEP 508 markers provided in Pipfile.
   clean         Uninstalls all packages not specified in Pipfile.lock.
-  graph         Displays currently–installed dependency graph information.
+  graph         Displays currently-installed dependency graph information.
   install       Installs provided packages and adds them to Pipfile, or (if no
                 packages are given), installs all packages from Pipfile.
   lock          Generates Pipfile.lock.
   open          View a given module in your editor.
+  requirements  Generate a requirements.txt from Pipfile.lock.
   run           Spawns a command installed into the virtualenv.
-  scripts       Displays the shortcuts in the (optional) [scripts] section of
-                Pipfile.
+  scripts       Lists scripts in current environment config.
   shell         Spawns a shell within the virtualenv.
   sync          Installs all packages specified in Pipfile.lock.
-  requirements  Generates a requirements.txt compatible output directly from Pipfile.lock
-  uninstall     Un-installs a provided package and removes it from Pipfile.
-
+  uninstall     Uninstalls a provided package and removes it from Pipfile.
+  update        Runs lock, then sync.
+  verify        Verify the hash in Pipfile.lock is up-to-date.

Steps to replicate

$ pipenv

---

Please run $ pipenv --support, and paste the results here. Don't put backticks (`) around it! The output already contains Markdown formatting.