Update nom requirement from 6.0.0 to 7.0.0 (#31)

Updates the requirements on [nom](https://github.com/Geal/nom) to permit the latest version.
- [Release notes](https://github.com/Geal/nom/releases)
- [Changelog](https://github.com/Geal/nom/blob/master/CHANGELOG.md)
- [Commits](rust-bakery/nom@6.0.0...7.0.0)

---
updated-dependencies:
- dependency-name: nom
  dependency-type: direct:production
...

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

Cargo.toml

@@ -15,7 +15,7 @@ coveralls = { repository = "Ortham/esplugin" }
 
 [dependencies]
 encoding_rs = "0.8.17"
-nom = "6.0.0"
+nom = "7.0.0"
 flate2 = { version = "1.0.1", optional = true }
 
 [dev-dependencies]