deps: bump it-merge from 1.0.4 to 2.0.0 (#393)

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

Author: dependabot[bot]

package.json

@@ -167,7 +167,7 @@
     "it-length": "^2.0.0",
     "it-length-prefixed": "^8.0.2",
     "it-map": "^2.0.0",
-    "it-merge": "^1.0.3",
+    "it-merge": "^2.0.0",
     "it-parallel": "^3.0.0",
     "it-pipe": "^2.0.3",
     "it-stream-types": "^1.0.4",