fix: Correctly parse boolean config options set to false

Previously, when parsing config options that were set to 'false',
e.g. `TOPEN_NOTES_QUIET=false` in the env vars,
we would still be setting it to true.

This change fixes any falsy value to be correctly parsed as False.

test/test_configuration.py

@@ -63,6 +63,16 @@ class TestEnv:
         assert env["task_rc"] == Path("/a/dir/that/dont/exist/file")
         assert env["task_data"] == Path("~/somewhere/tasks")
 
+    def test_env_parses_boolean_true(self, isolate_env, monkeypatch):
+        monkeypatch.setenv("TOPEN_NOTES_QUIET", "true")
+        env = parse_env()
+        assert env["notes_quiet"] is True
+
+    def test_env_parses_boolean_false(self, isolate_env, monkeypatch):
+        monkeypatch.setenv("TOPEN_NOTES_QUIET", "false")
+        env = parse_env()
+        assert env["notes_quiet"] is False
+
 
 @pytest.fixture
 def fake_rc(tmp_path: Path, monkeypatch):
@@ -89,6 +99,20 @@ class TestRcFile:
         assert rc_cfg["notes_editor"] == "micro"
         assert rc_cfg["notes_quiet"] is True
 
+    def test_taskrc_parses_boolean_true(self, fake_rc):
+        fake_rc.write_text("""
+        notes.quiet=true
+        """)
+        rc_cfg = parse_rc(fake_rc)
+        assert rc_cfg["notes_quiet"] is True
+
+    def test_taskrc_parses_boolean_false(self, fake_rc):
+        fake_rc.write_text("""
+        notes.quiet=false
+        """)
+        rc_cfg = parse_rc(fake_rc)
+        assert rc_cfg["notes_quiet"] is False
+
 
 class TestTConf:
     def test_paths_are_expanded(self):