fix CircleCI build errors

Author: lokst

.circleci/config.yml

@@ -19,7 +19,7 @@ jobs:
             - ./node_modules
       - run:
           name: test
-          command: npm contract-tests
+          command: npm contracts-test
       - store_artifacts:
           path: test-results.xml
           prefix: tests

.circleci/fetch-deps.sh

@@ -5,5 +5,6 @@ sudo add-apt-repository -y ppa:ethereum/ethereum
 sudo add-apt-repository -y ppa:ethereum/ethereum-dev
 sudo apt-get -y update
 sudo apt-get install -y curl
+sudo apt-get install -y dpkg
 curl -sL https://deb.nodesource.com/setup_8.x | sudo -E bash
 sudo apt-get install -y nodejs evm solc