force beancount < 3 and enable tests also on pull_request

.github/workflows/ci.yml

@@ -1,6 +1,7 @@
 name: ci
 on:
   push:
+  pull_request:
 jobs:
   test:
     name: Run tests and build distribution

.pre-commit-config.yaml

@@ -1,7 +1,7 @@
 exclude: '^docs/conf.py'
 
 repos:
-- repo: git://github.com/pre-commit/pre-commit-hooks
+- repo: https://github.com/pre-commit/pre-commit-hooks
   rev: v4.0.1
   hooks:
   - id: trailing-whitespace
@@ -18,7 +18,7 @@ repos:
     args: ['--fix=auto']
 
 - repo: https://github.com/pycqa/isort
-  rev: 5.9.3
+  rev: 5.13.2
   hooks:
   - id: isort
 
@@ -28,7 +28,7 @@ repos:
   - id: black
     language_version: python3
 
-- repo: https://gitlab.com/pycqa/flake8
+- repo: https://github.com/PyCQA/flake8
   rev: 3.9.2
   hooks:
   - id: flake8

setup.cfg

@@ -31,7 +31,7 @@ packages = find:
 setup_requires =
     setuptools_scm
 install_requires =
-    beancount>=2.0.0
+    beancount>=2.0.0,<3.0.0
     scikit-learn>=0.19
     numpy>=1.8.2
     scipy>=0.13.3