Bump defaultmap from 0.6.0 to 0.7.0

Bumps [defaultmap](https://github.com/JelteF/defaultmap) from 0.6.0 to 0.7.0.
- [Release notes](https://github.com/JelteF/defaultmap/releases)
- [Changelog](https://github.com/JelteF/defaultmap/blob/master/CHANGELOG.md)
- [Commits](JelteF/defaultmap@v0.6.0...v0.7.0)

---
updated-dependencies:
- dependency-name: defaultmap
  dependency-version: 0.7.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Cargo.lock

@@ -18,7 +18,7 @@ maintenance = { status = "experimental" }
 
 [dependencies]
 argparse = "0.2.2"
-defaultmap = "0.6.0"
+defaultmap = "0.7.0"
 float-ord = "0.3.2"
 group-by = "1.0.0"
 itertools = "0.11.0"