build: switch to pyproject & flint (#42)

MANIFEST.in

@@ -1,5 +1,4 @@
 include MANIFEST.in
-include requirements.txt
 include *.json
 include *.md
 include *.py
@@ -15,4 +14,4 @@ recursive-include payments *.png
 recursive-include payments *.py
 recursive-include payments *.svg
 recursive-include payments *.txt
-recursive-exclude payments *.pyc
+recursive-exclude payments *.pyc

pyproject.toml

@@ -0,0 +1,32 @@
+[project]
+name = "payments"
+authors = [
+    { name = "Frappe Technologies Pvt Ltd", email = "[email protected]"}
+]
+description = "Payments app for frappe"
+requires-python = ">=3.10"
+readme = "README.md"
+dynamic = ["version"]
+dependencies = [
+    "paytmchecksum~=1.7.0",
+    "razorpay~=1.2.0",
+    "stripe~=2.56.0",
+    "braintree~=4.20.0",
+    "pycryptodome~=3.18.0",
+]
+
+[build-system]
+requires = ["flit_core >=3.4,<4"]
+build-backend = "flit_core.buildapi"
+
+[tool.black]
+line-length = 99
+
+[tool.isort]
+line_length = 99
+multi_line_output = 3
+include_trailing_comma = true
+force_grid_wrap = 0
+use_parentheses = true
+ensure_newline_before_comments = true
+indent = "\t"