docs: python 3.7+ -> python 3.8+ (#1426)

* docs: `python 3.7+` -> `python 3.8+`

* Apply update to all docs

README.md

@@ -118,7 +118,7 @@ Upgrade pipx with `py -m pip install --user --upgrade pipx`.
 ### Using pipx without installing (via zipapp)
 
 You can also use pipx without installing it. The zipapp can be downloaded from
-[Github releases](https://github.com/pypa/pipx/releases) and you can invoke it with a Python 3.7+ interpreter:
+[Github releases](https://github.com/pypa/pipx/releases) and you can invoke it with a Python 3.8+ interpreter:
 
 ```
 python pipx.pyz ensurepath
@@ -201,7 +201,7 @@ Example:
 
 ```
 >> pipx install pycowsay
-  installed package pycowsay 2.0.3, Python 3.7.3
+  installed package pycowsay 2.0.3, Python 3.10.3
   These apps are now globally available
     - pycowsay
 done! ✨ 🌟 ✨
@@ -210,7 +210,7 @@ done! ✨ 🌟 ✨
 >> pipx list
 venvs are in /home/user/.local/share/pipx/venvs
 apps are exposed on your $PATH at /home/user/.local/bin
-   package pycowsay 2.0.3, Python 3.7.3
+   package pycowsay 2.0.3, Python 3.10.3
     - pycowsay
 
 

docs/comparisons.md

@@ -33,7 +33,7 @@ Example interaction: pipx installs packages to environments created with venv. `
 - pipx installs packages in virtual environments and exposes their entrypoints on your PATH
 
 Example interaction: Install a Python interpreter with pyenv, then install a package using pipx and that new
-interpreter: `pipx install black --python=python3.7` where python3.7 was installed on the system with pyenv
+interpreter: `pipx install black --python=python3.11` where python3.11 was installed on the system with pyenv
 
 ## pipx vs pipsi
 

docs/examples.md

@@ -30,7 +30,7 @@ pipx enables you to test various combinations of Python versions and package ver
 ```
 pipx run BINARY  # latest version of binary is run with python3
 pipx run --spec PACKAGE==2.0.0 BINARY  # specific version of package is run
-pipx run --python python3.7 BINARY  # Installed and invoked with specific Python version
+pipx run --python python3.10 BINARY  # Installed and invoked with specific Python version
 pipx run --python python3.9 --spec PACKAGE=1.7.3 BINARY
 pipx run --spec git+https://url.git BINARY  # latest version on default branch is run
 pipx run --spec git+https://url.git@branch BINARY
@@ -142,10 +142,10 @@ however, the installed packages won't be recognised as "injected".
 > pipx list
 venvs are in /Users/user/.local/pipx/venvs
 binaries are exposed on your $PATH at /Users/user/.local/bin
-   package black 18.9b0, Python 3.7.0
+   package black 18.9b0, Python 3.10.0
     - black
     - blackd
-   package pipx 0.10.0, Python 3.7.0
+   package pipx 0.10.0, Python 3.10.0
     - pipx
 
 > pipx list --short

docs/installation.md

@@ -1,6 +1,6 @@
 ## System Requirements
 
-python 3.7+ is required to install pipx. pipx can run binaries from packages with Python 3.3+. Don't have Python 3.7 or
+python 3.8+ is required to install pipx. pipx can run binaries from packages with Python 3.3+. Don't have Python 3.8 or
 later? See [Python 3 Installation & Setup Guide](https://realpython.com/installing-python/).
 
 You also need to have `pip` installed on your machine for `python3`. Installing it varies from system to system. Consult
@@ -90,7 +90,7 @@ terminal session and verify `pipx` does run.
 ### Using pipx without installing (via zipapp)
 
 The zipapp can be downloaded from [Github releases](https://github.com/pypa/pipx/releases) and you can invoke it with a
-Python 3.7+ interpreter:
+Python 3.8+ interpreter:
 
 ```
 python pipx.pyz ensurepath