Bump dlint from 0.11.0 to 0.12.0 (#1157)

Author: dependabot[bot]

requirements/requirements_dev.txt

@@ -2,7 +2,7 @@
 attrs>=19.2.0
 bandit==1.7.0
 black==21.7b0
-dlint==0.11.0
+dlint==0.12.0
 flake8==3.9.2
 flake8-bandit==2.1.2
 flake8-bugbear==21.4.3