Add nasm dependency setup to CI

The hope is this will helpt he windows build actually be able to work.

.github/workflows/test.yml

@@ -23,6 +23,7 @@ jobs:
       # RUSTDOCFLAGS: -Cpanic=abort
     runs-on: ${{matrix.os}}
     steps:
+      - uses: ilammy/setup-nasm@v1
       - uses: actions/checkout@v2
       - uses: actions-rs/toolchain@v1
         with: