cargo: bump pgp from 0.7.1 to 0.7.2

Bumps [pgp](https://github.com/rpgp/rpgp) from 0.7.1 to 0.7.2.
- [Release notes](https://github.com/rpgp/rpgp/releases)
- [Changelog](https://github.com/rpgp/rpgp/blob/master/release.toml)
- [Commits](https://github.com/rpgp/rpgp/compare/v0.7.1...v0.7.2)

---
updated-dependencies:
- dependency-name: pgp
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Cargo.toml

@@ -42,13 +42,13 @@ lettre_email = { git = "https://github.com/deltachat/lettre", branch = "master"
 libc = "0.2.101"
 log = {version = "0.4.8", optional = true }
 mailparse = "0.13.5"
-native-tls = "0.2.3"
+native-tls = "0.2.8"
 num_cpus = "1.13.0"
 num-derive = "0.3.0"
 num-traits = "0.2.6"
 once_cell = "1.8.0"
 percent-encoding = "2.0"
-pgp = { version = "0.7.0", default-features = false }
+pgp = { version = "0.7.2", default-features = false }
 pretty_env_logger = { version = "0.4.0", optional = true }
 quick-xml = "0.22.0"
 r2d2 = "0.8.9"