Add deprecated flags to imports-first metadata (#625)

src/index.js

@@ -34,7 +34,7 @@ export const rules = {
   'no-deprecated': require('./rules/no-deprecated'),
 
   // deprecated aliases to rules
-  'imports-first': require('./rules/first'),
+  'imports-first': require('./rules/imports-first'),
 }
 
 export const configs = {

src/rules/imports-first.js

@@ -0,0 +1,5 @@
+import first from './first'
+
+const newMeta = Object.assign({}, first.meta, { deprecated: true })
+
+module.exports = Object.assign({}, first, { meta: newMeta })

tests/src/package.js

@@ -53,5 +53,9 @@ describe('package', function () {
     }
   })
 
-})
+  it('marks deprecated rules in their metadata', function () {
+    expect(module.rules['imports-first'].meta.deprecated).to.be.true
+    expect(module.rules['first'].meta.deprecated).not.to.be.true
+  })
 
+})