Update minimum Pydantic version due to GHSA-5jqp-qgf6-3pvh

Author: glennmatthews

poetry.lock

@@ -16,7 +16,7 @@ include = [
 
 [tool.poetry.dependencies]
 python = "^3.6"
-pydantic = "^1.7.2"
+pydantic = "^1.7.4,!=1.8,!=1.8.1"
 structlog = "^20.1.0"
 colorama = {version = "^0.4.3", optional = true}