add tools.deps.edn to contrib libs

Author: puredanger

content/dev/contrib_libs.adoc

@@ -71,6 +71,7 @@ Status legend:
 | https://clojure.github.io/tools.build/[tools.build] | Functions for writing Clojure build programs | Alex Miller | Active
 | https://clojure.github.io/tools.cli/[tools.cli] | Command-line argument processor | Sean Corfield | Active
 | https://clojure.github.io/tools.deps/[tools.deps] | Deps as data and classpath construction | Alex Miller | Active
+| https://clojure.github.io/tools.deps,edn/[tools.deps.edn] | Reading, validating, and manipulating deps.edn data structures | Alex Miller | Active
 | https://clojure.github.io/tools.deps.cli/[tools.deps.cli] | Deps functions for use with Clojure CLI | Alex Miller | Active
 | https://clojure.github.io/tools.deps.graph/[tools.deps.graph] | Create dependency graphs for deps.edn projects | Alex Miller | Active
 | https://clojure.github.io/tools.gitlibs/[tools.gitlibs] | Tools for retrieving, caching, and using git-based projects | Alex Miller | Active