Bump reqwest dependency version to fix openssl build error

[mogenson]

Current master branch with rustc 1.30 fails to build with:

error: failed to run custom build command for `openssl v0.9.24`                     
process didn't exit successfully: `/tmp/cargo-installg2QM2v/release/build/openssl-1ff837db13969d3e/build-script-build` (exit code: 101)
--- stderr
thread 'main' panicked at 'Unable to detect OpenSSL version', /home/mike/.cargo/registry/src/github.aaakk.us.kg-1ecc6299db9ec823/openssl-0.9.24/build.rs:16:14
note: Run with `RUST_BACKTRACE=1` for a backtrace.

warning: build failed, waiting for other jobs to finish...
error: failed to compile `hodl-ticker v1.5.2`, intermediate artifacts can be found at `/tmp/cargo-installg2QM2v`

Caused by:
  build failed

Reqwest version 0.8.5 pulls in native-tls version 0.1.5 which pulls in
openssl 0.9.24 which doesn't build on machines with OpenSSL 1.1.

See openssl issue here: sfackler/rust-openssl#994

Bump reqwest to 0.9 to pull in native-tls 0.2.2 and openssl 0.10.15 to
fix the build error.

[kooparse]

Hi @mogenson,

Thanks for your fix! 👍