Adding parking_lot dependency to github workflow check-msrv job for 0.16 branch

Author: MichaelCG8

.github/workflows/ci.yml

@@ -112,6 +112,7 @@ jobs:
           import toml
           cargo_toml = toml.load("Cargo.toml")
           cargo_toml["dependencies"]["ndarray"] = "0.13.1"
+          cargo_toml["dependencies"]["parking_lot"] = "0.11.2"
           cargo_toml["dependencies"]["num-complex"] = "0.2.4"
           cargo_toml["workspace"] = {}
           with open("Cargo.toml", "w") as f:
@@ -127,9 +128,11 @@ jobs:
           import subprocess
           cargo_lock = toml.load("Cargo.lock")
           for pkg in cargo_lock["package"]:
+            pkg_id = pkg["name"] + ":" + pkg["version"]
             if pkg["name"] == "ndarray" and pkg["version"] != "0.13.1":
-              pkg_id = pkg["name"] + ":" + pkg["version"]
               subprocess.run(["cargo", "update", "--package", pkg_id, "--precise", "0.13.1"], check=True)
+            if pkg["name"] == "parking_lot" and pkg["version"] != "0.11.2":
+              subprocess.run(["cargo", "update", "--package", pkg_id, "--precise", "0.11.2"], check=True)
         working-directory: examples/simple
         shell: python
       - name: Test example