Call configlet subcommand on CI (#318)

This changes configlet to pass a subcommand.

For now, we've released a version of configlet which handles both the old command:

    configlet path/to/track

as well as the new command:

    configlet lint path/to/track

This will let us update all the travis files to include the subcommand before we
release the version of configlet that requires the subcommand.

Author: Katrina Owen

.travis.yml

@@ -8,5 +8,5 @@ env:
     - DOTNET_CLI_TELEMETRY_OPTOUT: 1
 script:
   - ./bin/fetch-configlet
-  - ./bin/configlet .
+  - ./bin/configlet lint .
   - ./build.sh

circle.yml

@@ -11,5 +11,5 @@ jobs:
       - checkout
       - run: apt-get -qq update; apt-get -y install unzip
       - run: ./bin/fetch-configlet
-      - run: ./bin/configlet .
-      - run: ./build.sh
+      - run: ./bin/configlet lint .
+      - run: ./build.sh