Update how release distribution is done

Author: Tattoo

requirements.txt

@@ -11,3 +11,4 @@ green>=3.1.3 # unit test runner
 docutils>=0.16   # needed to generate library documentation with libdoc
 Pygments>=2.6.1  # this one too
 twine>=3.1.1 # needed for releasing to pypi
+build>=0.6.0 # needed for building the distribution

tasks.py

@@ -92,4 +92,4 @@ def doc(context):
 
 @task(pre=[clean])
 def build(context):
-    run(f'python {CURDIR / "setup.py"} bdist_wheel')
+    run(f'python -m build --wheel')