build(deps): bump mypy from 1.18.2 to 1.19.0 in /block-kit (#21)

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Author: dependabot[bot]

block-kit/requirements.txt

@@ -1,4 +1,4 @@
-mypy==1.18.2
+mypy==1.19.0
 pytest==9.0.1
 ruff==0.14.6
 slack_sdk==3.39.0