Bump org.junit.jupiter:junit-jupiter-engine from 5.10.1 to 5.10.2 (#171)

Bumps [org.junit.jupiter:junit-jupiter-engine](https://github.com/junit-team/junit5) from 5.10.1 to 5.10.2.
- [Release notes](https://github.com/junit-team/junit5/releases)
- [Commits](junit-team/junit-framework@r5.10.1...r5.10.2)

---
updated-dependencies:
- dependency-name: org.junit.jupiter:junit-jupiter-engine
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Bump com.github.spotbugs from 5.2.4 to 6.0.2 (#146)

Bumps com.github.spotbugs from 5.2.4 to 6.0.2.

---
updated-dependencies:
- dependency-name: com.github.spotbugs
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Update version to 0.4.6-SNAPSHOT (#138)

Use version=0.4.5-SNAPSHOT in gradle.properties (#129)

There are no functional changes. The build and publish cycle needs verified.

Automate the sonatype project close and release

TravisCI automation used various shell scripts to upload to nexus, close the release, and mark is as a release.

That works but let's replace the scripts with the gradle plugin `io.github.gradle-nexus.publish-plugin`. This also required upgrading to a newer version of gradle.

Quote the publication reposity name

Use GitHub Actions to sign and publish the artifacts

Switch 'osmlab' links to 'maproulette'

Set 'useSystemProperties' on HttpClient builder

Set the httpClientBuilder.useSystemProperties() so that users may set the proxy settings
via system properties eg

```
-Djava.net.useSystemProxies=true
-Dhttp.proxyHost=PROXY_HOST
-Dhttp.proxyPort=PROXY_PORT
-Dhttp.proxyUser=USERNAME
-Dhttp.proxyPassword=PASSWORD
```

Merge pull request #87 from osmlab/rename-mr2

rename maproulette2 to maproulette-backend