ANN: ClojureScript 1.9.76

[David Nolen]

ClojureScript, the Clojure compiler that emits JavaScript source code.

README and source code: https://github.com/clojure/clojurescript

Leiningen dependency information:

    [org.clojure/clojurescript "1.9.76"]

This release brings cljs.spec to parity with Clojure 1.9.0-alpha7. It

addresses an issue with Transit analysis caching, includes fixes for

cljs.spec support under bootstrapped, bumps the Closure library

dependency, and includes other minor fixes and enhancements.

As always feedback welcome!

## 1.9.76

### Enhancements

* CLJS-1648: Getting Source Info into ex-info data for Analysis Errors

* cljs.spec updated to Clojure 1.9.0-alpha7 changes

### Changes

* bump Google Closure Library dep

* AOT cljs.spec nses

### Fixes

* CLJS-1679: Self-host: Incorporate spec tests

* CLJS-1680: Self-host: Don't require items no longer provided by Closure

* CLJS-1654: cljs.spec: var name in s/fdef non-conformance

* CLJS-1655: cljs.spec: conformer docstring indicates :clojure.spec/invalid

* CLJS-1656: Self-host: cljs.spec: speced-vars* fn not resolving

* CLJS-1661: cljs.spec: non-spec'ed fn var printing

* compute read/write opts for transit if possible, handle JSValue

* CLJS-1660: cljs.spec: Always return var from instrument / unstrument

* CLJS-1671: Bad cljs.spec interactive instrumentation session 

* CLJS-1664: The filename aux.cljs is a problem on windows.

* CLJS-1667: bad describe* for and-spec-impl

* CLJS-1699: Self-host: s/fdef ns-qualify *ns* name field access