Add CI checks, closes #6

.drone.yml

@@ -0,0 +1,29 @@
+---
+kind: pipeline
+type: docker
+name: default
+
+steps:
+  - name: flake8
+    image: python:3-alpine
+    depends_on:
+      - clone
+    commands:
+      - pip install -r requirements-dev.txt
+      - flake8 .
+
+  - name: isort
+    image: python:3-alpine
+    depends_on:
+      - clone
+    commands:
+      - pip install -r requirements-dev.txt
+      - isort --check --diff .
+
+  - name: mypy
+    image: python:3-alpine
+    depends_on:
+      - clone
+    commands:
+      - pip install -r requirements-dev.txt
+      - mypy .

.flake8

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+[flake8]
+exclude=build,.cache,.eggs,.git
+# Override the errors that Flake8 ignores by default to lint very hard.
+# Only ignore W503, which is deprecated and conflicts with W504.
+ignore=W503

requirements-dev.txt

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+flake8~=3.9
+isort>=5.9
+mypy~=0.910
+types-requests==2.25.0

requirements.txt

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+requests~=2.22
+xmltodict==0.12