Revert "Bump typing-extensions, use compatible semver"

This reverts commit dae3675.

Causes CI failure.

Author: i80and

pyproject.toml

@@ -16,7 +16,7 @@ requires = [
     "requests ~= 2.24",
     "toml ~= 0.10",
     "pyyaml ~= 5.3",
-    "typing-extensions ^= 3.10.0.0",
+    "typing-extensions ~= 3.7.4.1",
     "python-jsonrpc-server ~= 0.3.4",
     "fett ~= 0.3.2",
     "networkx ~= 2.4",