use newwer image to run tests

Author: masci

Diff for: .drone.yml

@@ -3,20 +3,20 @@ name: default
 
 steps:
 - name: lint
-  image: arduino/arduino-cli:drone-0.2.0
+  image: arduino/arduino-cli:drone-0.2.1
   commands:
     # Check if the Go code is properly formatted and run the linter
     - task check
     # Ensure protobufs compile
     - task protoc
 
 - name: build
-  image: arduino/arduino-cli:drone-0.2.0
+  image: arduino/arduino-cli:drone-0.2.1
   commands:
     - task build
 
 - name: test
-  image: arduino/arduino-cli:drone-0.2.0
+  image: arduino/arduino-cli:drone-0.2.1
   commands:
     - task test
     - task test-legacy
@@ -25,7 +25,7 @@ steps:
 # To avoid exposing the Codecov token to external PRs, we only upload coverage when we merge on
 # `master`.
 - name: coverage
-  image: arduino/arduino-cli:drone-0.2.0
+  image: arduino/arduino-cli:drone-0.2.1
   environment:
     CODECOV_TOKEN:
       from_secret: codecov_token