Support for Elasticsearch 7.4 (#979)

* Update code generation (#969)

* Updated code generation scripts to use the new spec

* API generation

* Fix bad link

* Updated API reference doc (#945)

* Updated API reference doc

* Updated docs script

* Fix issue; node roles are defaulting to true when undefined (fal… (#967)

* Fix issue; nodeFilter was unable to filter because master, data, and ingest role were true if even they were false on the node.

* Test nodesToHost of BaseConnectionPool correctly maps node roles

* API generation

* Docker: use 7.4-SNAPSHOT

* API generation

* Use 7.4 stable

scripts/generate.js

@@ -101,6 +101,8 @@ function start (opts) {
       log.text = `Processing ${file}`
 
       const spec = require(join(apiFolder, file))
+      // const { stability } = spec[Object.keys(spec)[0]]
+      // if (stability !== 'stable') return
       allSpec.push(spec)
       const code = generate(opts.branch || opts.tag, spec, common)
       const filePath = join(apiOutputFolder, `${file.slice(0, file.lastIndexOf('.'))}.js`)