Update dependency @types/readable-stream to v4

Author: renovate[bot]

package.json

@@ -95,7 +95,7 @@
     "version": "manual-git-changelog onversion"
   },
   "dependencies": {
-    "@types/readable-stream": "^2.3.13",
+    "@types/readable-stream": "^4.0.0",
     "buffer": "^6.0.3",
     "rdf-data-factory": "^2.0.0",
     "relative-to-absolute-iri": "^1.0.0",

yarn.lock

@@ -723,6 +723,14 @@
     "@types/node" "*"
     safe-buffer "~5.1.1"
 
+"@types/readable-stream@^4.0.0":
+  version "4.0.18"
+  resolved "https://registry.yarnpkg.com/@types/readable-stream/-/readable-stream-4.0.18.tgz#5d8d15d26c776500ce573cae580787d149823bfc"
+  integrity sha512-21jK/1j+Wg+7jVw1xnSwy/2Q1VgVjWuFssbYGTREPUBeZ+rqVFl2udq0IkxzPC0ZhOzVceUbyIACFZKLqKEBlA==
+  dependencies:
+    "@types/node" "*"
+    safe-buffer "~5.1.1"
+
 "@types/sax@^1.0.1":
   version "1.2.7"
   resolved "https://registry.yarnpkg.com/@types/sax/-/sax-1.2.7.tgz#ba5fe7df9aa9c89b6dff7688a19023dd2963091d"