tests: run tests against eslint@next

Author: BenoitZugmeyer

.travis.yml

@@ -10,6 +10,8 @@ matrix:
       env: ESLINT_VERSION=latest RUN_LINT=true RUN_INTEGRATION=true
     - node_js: 12
       env: ESLINT_VERSION=4.7 RUN_INTEGRATION=true
+    - node_js: 12
+      env: ESLINT_VERSION=next RUN_INTEGRATION=true
 
 script:
   - if [[ $RUN_LINT = true ]]; then npm run lint; fi

src/__tests__/plugin.js

@@ -7,7 +7,9 @@ const eslintVersion = require("eslint/package.json").version
 const plugin = require("..")
 
 function matchVersion(versionSpec) {
-  return semver.satisfies(eslintVersion, versionSpec)
+  return semver.satisfies(eslintVersion, versionSpec, {
+    includePrerelease: true,
+  })
 }
 
 function ifVersion(versionSpec, fn, ...args) {