Upgrade urllib3 to fix CVE-2019-11324

https://nvd.nist.gov/vuln/detail/CVE-2019-11324

Change-Id: I85cb64e87f84e39e06b1259bbdbe3e449fad485c
diff --git a/Pipfile.lock b/Pipfile.lock
index bf99d54..55ce371 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -109,10 +109,10 @@
         },
         "urllib3": {
             "hashes": [
-                "sha256:61bf29cada3fc2fbefad4fdf059ea4bd1b4a86d2b6d15e1c7c0b582b9752fe39",
-                "sha256:de9529817c93f27c8ccbfead6985011db27bd0ddfcdb2d86f3f663385c6a9c22"
+                "sha256:4c291ca23bbb55c76518905869ef34bdd5f0e46af7afe6861e8375643ffee1a0",
+                "sha256:9a247273df709c4fedb38c711e44292304f73f39ab01beda9f6b9fc375669ac3"
             ],
-            "version": "==1.24.1"
+            "version": "==1.24.2"
         }
     },
     "develop": {