Update circleci config to publish coverage report to codecov (#96)

- Upgrade `sbt-scoverage` to support Scala 2.13.8
- Update `.circleci/config.yml`
  - Combine `sbt` commands to save on startup time
  - Publish to codecov using a CircleCI orb
  - Use `exec` to close out `stdin`

.circleci/config.yml

@@ -1,6 +1,9 @@
-# Scala CircleCI 2.0 configuration file
+# Scala CircleCI 2.x configuration file
 # See: https://circleci.com/docs/2.0/sample-config/
-version: 2
+version: '2.1'
+
+orbs:
+  codecov: codecov/codecov@3.2.2
 
 # Define a job to be invoked later in a workflow.
 # See: https://circleci.com/docs/2.0/configuration-reference/#jobs
@@ -36,12 +39,14 @@ jobs:
             # fallback to using the latest cache if no exact match is found
             - v1-dependencies-
 
-      - run: cat /dev/null | sbt 'Test / compile'
+      # Compile, run tests, and produce coverage reports!
+      - run: exec 0<&- && sbt clean coverage test coverageReport coverageAggregate shutdown
 
+      # Save cached artifacts
       - save_cache:
           paths:
             - ~/.m2
           key: v1-dependencies--{{ checksum "build.sbt" }}
 
-      # run tests!
-      - run: cat /dev/null | sbt test
+      # Upload the coverage reports codecov using the secure Orb
+      - codecov/upload

codecov.yml

@@ -1,17 +1,15 @@
+codecov:
+  ci:
+    - "circleci.com"
+
 coverage:
+  # TODO: Use better coverage configs after adding better unit test coverage
   status:
     patch:
       default:
         target: 50%
         threshold: 0%
-        branches:
-          - master
-          - prototype
     project:
       default:
-        # TODO: Use better coverage configs after adding better unit test coverage
         target: 50%
         threshold: 0%
-        branches:
-          - master
-          - prototype

project/plugins.sbt

@@ -1,5 +1,5 @@
 addSbtPlugin("com.dwijnand" % "sbt-dynver" % "4.1.1")
 addSbtPlugin("org.jetbrains.scala" % "sbt-ide-settings" % "1.1.1")
 addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.4.6")
-addSbtPlugin("org.scoverage" % "sbt-scoverage" % "1.9.3")
+addSbtPlugin("org.scoverage" % "sbt-scoverage" % "2.0.0-M4")
 addSbtPlugin("org.xerial.sbt" % "sbt-sonatype" % "3.9.10")