Merge pull request #215 from RalfJung/miri

update Miri CI config

Author: bluss

.github/workflows/ci.yml

@@ -51,6 +51,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - name: Miri
-        run: ci/miri.sh
-
+      - name: Install Miri
+        run: |
+          rustup toolchain install nightly --component miri
+          rustup override set nightly
+          cargo miri setup
+      - name: Test with Miri
+        run: cargo miri test