Fix textual CLI not working, drop Python 3.7.

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "textual-dev"
-version = "1.2.1"
+version = "1.3.0"
 homepage = "https://github.com/Textualize/textual-dev"
 description = "Development tools for working with Textual"
 authors = ["Will McGugan <will@textualize.io>", "Dave Pearson <dave@textualize.io>"]
@@ -27,7 +27,7 @@ include = [
 ]
 
 [tool.poetry.dependencies]
-python = "^3.7"
+python = "^3.8"
 textual = ">=0.36.0"
 aiohttp = ">=3.8.1"
 click = ">=8.1.2"

src/textual_dev/cli.py

@@ -4,7 +4,7 @@
 import shlex
 
 import click
-from importlib_metadata import version
+from importlib.metadata import version
 from textual.constants import DEVTOOLS_HOST, DEVTOOLS_PORT
 
 from .tools.run import exec_command, run_app

src/textual_dev/renderables.py

@@ -4,7 +4,7 @@
 from pathlib import Path
 from typing import Iterable
 
-from importlib_metadata import version
+from importlib.metadata import version
 from rich.align import Align
 from rich.console import Console, ConsoleOptions, RenderResult
 from rich.markup import escape

src/textual_dev/tools/diagnose.py

@@ -8,7 +8,7 @@
 from functools import singledispatch
 from typing import Any
 
-from importlib_metadata import version
+from importlib.metadata import version
 from rich.console import Console, ConsoleDimensions
 
 

tests/test_cli.py

@@ -1,5 +1,5 @@
 from click.testing import CliRunner
-from importlib_metadata import version
+from importlib.metadata import version
 
 from textual_dev.cli import run