chore(no-unused-vars): Fix test cases

Author: michalsnik

tests/lib/rules/no-unused-vars.js

@@ -36,10 +36,10 @@ tester.run('no-unused-vars', rule, {
       code: '<template><ol v-for="i in data"><li v-for="f in i">{{ f.bar.baz }}</li></ol></template>'
     },
     {
-      code: '<template scope="props">{{props}}</template>'
+      code: '<template><template scope="props">{{props}}</template></template>'
     },
     {
-      code: '<template scope="props"><span v-if="props"></span></template>'
+      code: '<template><template scope="props"><span v-if="props"></span></template></template>'
     },
     {
       code: '<template><div v-for="(item, key) in items" :key="key">{{item.name}}</div></template>'
@@ -61,7 +61,7 @@ tester.run('no-unused-vars', rule, {
       errors: ["'props' is defined but never used."]
     },
     {
-      code: '<template><span><template slot-scope="props"></template></span></template>',
+      code: '<template><span><template scope="props"></template></span></template>',
       errors: ["'props' is defined but never used."]
     },
     {