* Start using JUnit 5
This converts a single test class over to JUnit 5 (YamlUtilsTest). The main
differences you'll notice are that @RunWith isn't needed anymore, test classes
and test methods can now be package-private, and the @Test annotation comes from
the org.junit.jupiter.api package instead of org.junit. There's a lot more
differences between 4 and 5 than this that we'll need to keep in mind when
converting more test classes; for some more details, see:
https://www.baeldung.com/junit-5-migration
In order to allow JUnit 4 and 5 test classes to coexist, I've had to add two new
dependencies, org.junit.jupiter:junit-jupiter-engine and
org.junit.vintage:junit-vintage-engine, which exist in addition to junit:junit
for now. Eventually, once we've completed migrating over all JUnit 4 test
classes, then we can remove junit and junit-vintage-engine and just be left with
junit-jupiter-engine.
* Delete no longer needed lockfiles
* Merge branch 'master' into first-junit5
* Upgradle JUnit to 4.13
Removed third_party/junit folder and all usage of the
JunitBackPort class. As a result, third_party is no
longer a Gradle subproject.
Minor code changes were needed to work around an
error-prone pattern: multiple statement in assertThrows'
runnable lambda.
Also third_party/activation and third_party/jsch. These
dependencies are loaded from remote maven repo. The local
copies are not in use.
* Upgrade to Truth 1.0
Refactored fail(...) to assertWithMessage().fail().
Upgraded com.google.monitoring-client family of dependencies to 1.0.6
Also fixed bad use of io.StringIO (on binary buffer) recently introduced to
google-java-format-diff.py.
