Add cargo-deny GitHub action (#11)

* Add cargo-deny GitHub action

* Remove Travis rule from mergify

.github/workflows/ci.yaml

@@ -27,6 +27,12 @@ jobs:
           command: clippy
           args: --all-features -- -D warnings
 
+  cargo-deny:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - uses: EmbarkStudios/cargo-deny-action@v0
+
   test:
     name: Test
     runs-on: macOS-latest

.mergify.yml

@@ -5,7 +5,6 @@ pull_request_rules:
       - "#review-requested=0"
       - "#changes-requested-reviews-by=0"
       - "#commented-reviews-by=0"
-      - status-success=Travis CI - Pull Request
       - base=master
       - label!=work-in-progress
     actions:

deny.toml

@@ -0,0 +1,17 @@
+[bans]
+multiple-versions = "deny"
+deny = []
+skip = []
+
+[licenses]
+unlicensed = "deny"
+# We want really high confidence when inferring licenses from text
+confidence-threshold = 0.92
+allow = [
+    "Apache-2.0",
+    "BSD-2-Clause",
+    "BSD-3-Clause",
+    "ISC",
+    "MIT",
+    "MPL-2.0",
+]