chore: update dependencies and fix all associated warnings (clippy, f…

…mt, -D warning, etc) (#457)

* chore: update dependencies and fix associated warnings

* chore: oops, forgot fmt

* chore: clippy

* chore: more clippy

* chore: fmt

* ci: add backtrace, to find discrepency in test

* chore: trying to figure out why CI fails tests that succeed locally

.github/workflows/synth.yml

@@ -15,4 +15,4 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - uses: dtolnay/rust-toolchain@nightly
-      - run: cargo test
+      - run: RUST_BACKTRACE=1 cargo test