Build nightly to fix CI

Author: jakelang

circle.yml

@@ -12,6 +12,7 @@ jobs:
             rustup target add wasm32-unknown-unknown
             rustup component add rustfmt-preview
             rustup update
+            rustup install nightly
       - run:
            name: Check formatting
            command: |
@@ -20,7 +21,7 @@ jobs:
              git diff --exit-code
       - run:
           name: Test
-          command: cargo test --target=x86_64-unknown-linux-gnu
+          command: cargo +nightly test --target=x86_64-unknown-linux-gnu
       - run:
-          name: Build
-          command: cargo build --release
+          name: Build Nightly
+          command: cargo +nightly build --release