deps: bump it-pb-stream from 2.0.4 to 3.2.1 (libp2p#118)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -153,7 +153,7 @@
     "err-code": "^3.0.1",
     "it-length-prefixed": "^8.0.3",
     "it-merge": "^2.0.0",
-    "it-pb-stream": "^2.0.3",
+    "it-pb-stream": "^3.2.1",
     "it-pipe": "^2.0.4",
     "it-pushable": "^3.1.0",
     "it-stream-types": "^1.0.4",