chore: update semantic-release to handle 'main' branch (#10)

* chore: update semantic-release to handle 'main' branch
* chore: switch to Azure DevOps for CI

Author: billiegoose

.releaserc

@@ -0,0 +1,9 @@
+branches:
+  - '+([0-9])?(.{+([0-9]),x}).x'
+  - 'main'
+  - 'next'
+  - 'next-major'
+  - name: 'beta'
+    prerelease: true
+  - name: 'alpha'
+    prerelease: true

.travis.yml

@@ -0,0 +1,32 @@
+jobs:
+- job: Linux
+
+  pool:
+    vmImage: 'Ubuntu 16.04'
+
+  steps:
+  - task: NodeTool@0
+    inputs:
+      versionSpec: '10.x'
+    displayName: 'Install Node.js'
+
+  - script: npm ci
+    displayName: 'Install dependencies'
+
+  - script: npm pack
+    displayName: 'Prepare installable tarball'
+    condition: succeededOrFailed()
+
+  - task: PublishBuildArtifacts@1
+    displayName: 'Save npm-tarball.tgz'
+    condition: and(succeededOrFailed(), ne(variables['system.pullrequest.isfork'], true))
+    inputs:
+      artifactName: 'npm-tarball.tgz'
+      PathtoPublish: '$(System.DefaultWorkingDirectory)/git-http-mock-server-0.0.0-development.tgz'
+
+  - script: npm run semantic-release
+    displayName: 'Publish to npm'
+    condition: and(succeeded(), eq(variables['Build.SourceBranch'], 'refs/heads/main'))
+    env:
+      GH_TOKEN: $(GITHUB_TOKEN)
+      NPM_TOKEN: $(Npm.Token)