build(deps): update handlebars requirement from =4.3.6 to =4.3.7

Updates the requirements on [handlebars](https://github.com/sunng87/handlebars-rust) to permit the latest version.
- [Release notes](https://github.com/sunng87/handlebars-rust/releases)
- [Changelog](https://github.com/sunng87/handlebars-rust/blob/v4.3.7/CHANGELOG.md)
- [Commits](sunng87/handlebars-rust@v4.3.6...v4.3.7)

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

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

lib/Cargo.toml

@@ -26,7 +26,7 @@ const_format = "0.2"
 regex = "1.6"
 jsonpath_lib = "0.3"
 jsonpath-plus = "0.1"
-handlebars = "=4.3.6"
+handlebars = "=4.3.7"
 lazy_static = "1.4"
 base64 = { version = "0.21", default-features = false, features = ["alloc"] }
 futures = "0.3"