feat(clojure): Add basic support for Leiningen and `deps.edn` (#3685)

lib/config/definitions.js

lib/manager/deps-edn/extract.js

lib/manager/deps-edn/index.js

lib/manager/deps-edn/update.js

lib/manager/index.js

lib/manager/leiningen/extract.js

lib/manager/leiningen/index.js

lib/manager/leiningen/update.js

lib/manager/maven/update.js

lib/manager/sbt/update.js

renovate-schema.json

test/config/__snapshots__/validation.spec.js.snap

test/manager/deps-edn/__snapshots__/extract.spec.js.snap

test/manager/deps-edn/_fixtures/deps.edn

test/manager/deps-edn/extract.spec.js

test/manager/deps-edn/update.spec.js

test/manager/leiningen/__snapshots__/extract.spec.js.snap

test/manager/leiningen/_fixtures/project.clj

test/manager/leiningen/extract.spec.js

test/manager/leiningen/update.spec.js