Update dependency is-stream to v4

Author: renovate[bot]

package.json

@@ -50,7 +50,7 @@
     "@types/readable-stream": "^4.0.0",
     "@types/sparqljs": "^3.0.0",
     "cross-fetch": "^4.0.0",
-    "is-stream": "^2.0.0",
+    "is-stream": "^4.0.0",
     "n3": "^1.0.0",
     "rdf-string": "^1.0.0",
     "sparqljs": "^3.0.0",

yarn.lock

@@ -3604,6 +3604,11 @@ is-stream@^3.0.0:
   resolved "https://registry.yarnpkg.com/is-stream/-/is-stream-3.0.0.tgz#e6bfd7aa6bef69f4f472ce9bb681e3e57b4319ac"
   integrity sha512-LnQR4bZ9IADDRSkvpqMGvt/tEJWclzklNgSw48V5EAaAeDd6qGvN8ei6k5p0tvxSR171VmGyHuTiAOfxAbr8kA==
 
+is-stream@^4.0.0:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/is-stream/-/is-stream-4.0.1.tgz#375cf891e16d2e4baec250b85926cffc14720d9b"
+  integrity sha512-Dnz92NInDqYckGEUJv689RbRiTSEHCQ7wOVeALbkOz999YpqT46yMRIGtSNl2iCL1waAZSx40+h59NV/EwzV/A==
+
 is-string@^1.0.5, is-string@^1.0.7:
   version "1.0.7"
   resolved "https://registry.yarnpkg.com/is-string/-/is-string-1.0.7.tgz#0dd12bf2006f255bb58f695110eff7491eebc0fd"