fix: pin native-tls to <= 0.2.13

[native-tls 0.2.14 bumped their MSRV from 1.53.0 to 1.80.0](sfackler/rust-native-tls@v0.2.12...v0.2.14), which we don't support.
Since tokio-native-tls has dependency to native-tls = "0.2", is causing the tests to break.

This pins the `native-tls` to `<= 0.2.13`.

Author: augustoccesar

Cargo.toml

@@ -163,6 +163,7 @@ actix-web = "4.2.1"
 # We have a few deps that have MSRVs that are higher than our own. 
 # We pin them here to ensure that we can run tests on the MSRV
 bumpalo = ">=3.0.0, <= 3.15.0"
+native-tls = ">= 0.2.0, <= 0.2.13"
 
 [[example]]
 name = "checkout"