Bump concat-stream from 1.6.2 to 2.0.0 (#45)

Bumps [concat-stream](https://github.com/maxogden/concat-stream) from 1.6.2 to 2.0.0.
- [Release notes](https://github.com/maxogden/concat-stream/releases)
- [Commits](max-mapper/concat-stream@v1.6.2...v2.0.0)

---
updated-dependencies:
- dependency-name: concat-stream
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

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

Author: dependabot[bot]

package.json

@@ -40,7 +40,7 @@
     "babel-plugin-transform-es2015-modules-commonjs": "^6.26.0",
     "babelify": "^8.0.0",
     "browserify": "^16.1.1",
-    "concat-stream": "^1.6.1",
+    "concat-stream": "^2.0.0",
     "net-browserify-stub": "0.0.1",
     "standard": "^17.0.0",
     "tape": "^4.9.0",