Replace Travis CI with Github Actions, add Release Drafter

.github/release-drafter.yml

@@ -0,0 +1,20 @@
+name-template: '$NEXT_PATCH_VERSION'
+tag-template: '$NEXT_PATCH_VERSION'
+categories:
+  - title: "Documentation"
+    labels:
+      - 'documentation'
+  - title: 'Features'
+    labels:
+      - 'new feature'
+      - 'enhancement'
+      - 'performance improvement'
+  - title: 'Bug Fixes'
+    labels:
+      - 'bug'
+exclude-labels:
+  - 'skip-changelog'
+change-template: '- $TITLE @$AUTHOR (#$NUMBER)'
+template: |
+  ## Changes
+  $CHANGES

.github/workflows/label-verifier.yml

@@ -0,0 +1,13 @@
+name: "Verify type labels"
+
+on:
+  pull_request:
+    types: [opened, labeled, unlabeled, synchronize]
+
+jobs:
+  triage:
+    runs-on: ubuntu-18.04
+    steps:
+      - uses: zwaldowski/match-label-action@v2
+        with:
+          allowed: 'bug, enhancement, new feature, documentation'

.github/workflows/release-drafter.yml

@@ -0,0 +1,16 @@
+name: Release Drafter
+
+on:
+  push:
+    # branches to consider in the event; optional, defaults to all
+    branches:
+      - master
+
+jobs:
+  update_release_draft:
+    runs-on: ubuntu-latest
+    steps:
+      # Drafts your next Release notes as Pull Requests are merged into "master"
+      - uses: release-drafter/release-drafter@v5
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/scala.yml

@@ -0,0 +1,44 @@
+name: Scala CI
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  test:
+    runs-on: ${{matrix.os}}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest]
+        scala: [2.11.12, 2.12.12, 2.13.3]
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Cache jabba
+        uses: actions/cache@v1
+        with:
+          path: ~/.jabba
+          key: ${{ runner.os }}-jabba-cache-${{ hashFiles('**/workflows/scala.yml') }}
+
+      - name: Cache SBT ivy cache
+        uses: actions/cache@v1
+        with:
+          path: ~/.ivy2/cache
+          key: ${{ runner.os }}-sbt-ivy-cache-${{ hashFiles('**/build.sbt') }}
+
+      - name: Cache SBT
+        uses: actions/cache@v1
+        with:
+          path: ~/.sbt
+          key: ${{ runner.os }}-sbt-${{ hashFiles('**/build.sbt') }}
+
+      - uses: olafurpg/setup-scala@v5
+        with:
+          java-version: graalvm@20.0.0
+
+      - name: Test
+        run: sbt ++${{matrix.scala}} test

README.md

@@ -1,6 +1,6 @@
 | CI | Release | 
 | --- | --- |
-| [![Build Status](https://travis-ci.org/tethys-json/tethys.svg?branch=master)](https://travis-ci.org/manatki/derevo) | [![Maven Central](https://img.shields.io/maven-central/v/com.tethys-json/tethys-core_2.13.svg)](https://search.maven.org/search?q=com.tethys-json.tethys-json) | 
+| [![Build Status](https://github.com/tethys-json/tethys/workflows/Scala%20CI/badge.svg)](https://github.com/tethys-json/tethys/actions) | [![Maven Central](https://img.shields.io/maven-central/v/com.tethys-json/tethys-core_2.13.svg)](https://search.maven.org/search?q=com.tethys-json.tethys-json) | 
 
 # tethys
 tethys is a JSON parsing/writing library for Scala