Add codecov orb for coverage results

Author: maurolacy

.circleci/config.yml

@@ -1,4 +1,8 @@
-version: 2
+version: 2.1
+
+orbs:
+  codecov: codecov/codecov@3.2.2
+
 workflows:
   version: 2
   test:
@@ -34,6 +38,7 @@ workflows:
                 # Long living branches
                 - main
                 # 👇Add your branch here if benchmarking matters to your work
+
   coverage:
     jobs:
       - coverage:
@@ -705,15 +710,21 @@ jobs:
             - target
           key: cargocache-v2-benchmarking-rust:1.58.1-{{ checksum "~/project/Cargo.lock" }}
 
-  # This job follows the instructions from https://github.com/xd009642/tarpaulin#circleci
   coverage:
+    # https://circleci.com/developer/images?imageType=machine
     machine:
       image: ubuntu-2004:202201-02
     steps:
       - checkout
       - run:
-          name: Coverage with tarpaulin docker image
-          command: docker run --security-opt seccomp=unconfined -v "${PWD}:/volume" xd009642/tarpaulin
+          name: Run tests with coverage
+          command: |
+            mkdir -p cov
+            docker run --security-opt seccomp=unconfined -v "${PWD}:/volume" xd009642/tarpaulin \
+              sh -c "cargo tarpaulin --skip-clean --frozen --out Xml --output-dir cov"
+      - codecov/upload:
+          file: cov/cobertura.html
+          flags: cw-plus
 
   # This job roughly follows the instructions from https://circleci.com/blog/publishing-to-github-releases-via-circleci/
   build_and_upload_contracts: