Update scripts to use mkcert.org

Author: Lukasa

Makefile

@@ -1,5 +1,5 @@
 update:
-	curl http://ci.kennethreitz.org/job/ca-bundle/lastSuccessfulBuild/artifact/cacerts.pem -o certifi/cacert.pem
+	curl https://mkcert.org/generate/ -o certifi/cacert.pem
 
 publish:
 	python setup.py publish

tasks.py

@@ -2,4 +2,4 @@
 
 @task
 def update():
-    run("curl http://ci.kennethreitz.org/job/ca-bundle/lastSuccessfulBuild/artifact/cacerts.pem -o certifi/cacert.pem")
+    run("curl https://mkcert.org/generate/ -o certifi/cacert.pem")