Update dependency adal to v1.2.0 (#2757)

Author: renovate[bot]

frozen_requirements.txt

@@ -15,7 +15,7 @@ git+https://github.com/dcos/dcos-cli.git@f1fd38c9e72e1d521cf8120fe4948a789fb40cb
 git+https://github.com/dcos/dcos-cli.git@f1fd38c9e72e1d521cf8120fe4948a789fb40cbc  # validator-hint: name=dcos version=SNAPSHOT
 git+https://github.com/dcos/dcos-test-utils.git@3ebfc18ff9c5a1aa382311474a9192a68c98b0a7  # validator-hint: version=0.1
 git+https://github.com/dcos/dcos-launch.git@dc1e116685fba5105f322b007549b7eb104cf441  # validator-hint: version=0.1.0
-adal==1.1.0
+adal==1.2.0
 altgraph==0.16.1
 appdirs==1.4.3
 asn1crypto==0.24.0