BREAKING: junit: Use default element name in `@DictionaryEntries`

This allows for cleaner syntax (`@DictionaryEntries({"a", "b"})` and
avoids introducing yet another term (`token`).

tests: Extract common base class out of lifecycle tests

deploy: Inject Jazzer version via a flag

This removes the need to have a "version bump" commit before every
release.

deploy: Bump version to 0.21.0

deploy: Verify that `jazzer.jar` is a valid Jazzer jar

Release v0.20.0 failed because the zip containing the Jazzer jar was
passed in instead of the Jazzer jar itself.

deploy: Bump version to 0.20.0

deploy: Prepare release v0.19.0

Fix Windows CI build

deploy: Prepare release v0.17.1

deploy: Prepare release v0.17.0