Bump check-if-email-exists from 0.8.15 to 0.8.16

Bumps [check-if-email-exists](https://github.com/amaurymartiny/check-if-email-exists) from 0.8.15 to 0.8.16.
- [Release notes](https://github.com/amaurymartiny/check-if-email-exists/releases)
- [Changelog](https://github.com/amaurymartiny/check-if-email-exists/blob/master/CHANGELOG.md)
- [Commits](reacherhq/check-if-email-exists@v0.8.15...v0.8.16)

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

Author: dependabot-preview[bot]

Cargo.lock

@@ -25,7 +25,7 @@ hubcaps = "0.6"
 linkify = "0.4.0"
 regex = "1.4.2"
 url = "2.2.0"
-check-if-email-exists = "0.8.15"
+check-if-email-exists = "0.8.16"
 indicatif = "0.15.0"
 structopt = "0.3"
 toml = "0.5.7"