Make python 3.8 minimum supported version

aiohttp dropped python3.7 support https://github.com/aio-libs/aiohttp/releases/tag/v3.9.0b0

node/README.md

@@ -11,7 +11,7 @@ required, however, you can disable it explicitly via `--no-xdg-layout`.
 ## Requirements
 
 - flatpak-builder 1.1.2 or newer
-- Python 3.7+.
+- Python 3.8+.
 - [pipx](https://pypa.github.io/pipx/) (recommended) or
   [pip](https://pip.pypa.io/en/stable/) (both of these are usually available in
   your distro repositories, the latter is often included with Python installs).

node/pyproject.toml

@@ -5,7 +5,6 @@ description = ""
 authors = ["Ryan Gonzalez <ryan.gonzalez@collabora.com>", "Filippe LeMarchand <gasinvein@gmail.com>"]
 
 [tool.poetry.dependencies]
-python = "^3.7"
 python = "^3.8"
 aiohttp = "^3.9.0rc0"
 
@@ -25,7 +24,7 @@ flatpak-node-generator = "flatpak_node_generator.main:main"
 
 [tool.blue]
 line-length = 88
-target-version = ["py37"]
+target-version = ["py38"]
 
 [tool.isort]
 from_first = true
@@ -34,7 +33,7 @@ profile = "black"
 src_paths = ["flatpak_node_generator", "tests"]
 
 [tool.mypy]
-python_version = "3.7"
+python_version = "3.8"
 exclude = "^(.*/)?((([^/]+)-quick-start)|(\\.venv)|npm-cache|yarn-mirror)/.*$"
 strict = true