lint: fix eslint no-unused-vars rule

We use rest siblings a lot, including those with specifically excluded
list of some variables, e.g. to ensure that there are no unknown options.

.eslintrc.json

@@ -43,7 +43,7 @@
     "no-proto": 2,
     "no-prototype-builtins": 2,
     "no-shadow": 2,
-    "no-unused-vars": [2, { "vars": "all", "args": "after-used", "ignoreRestSiblings": false }],
+    "no-unused-vars": [2, { "vars": "all", "args": "after-used", "ignoreRestSiblings": true }],
     "prefer-const": 2,
     "prefer-object-spread": 2,
     "prefer-template": 2,

src/compile.js

@@ -48,7 +48,7 @@ const compileSchema = (schema, root, opts, scope, basePathRoot = '') => {
     removeAdditional = false, // supports additionalProperties: false and additionalItems: false
     includeErrors = false,
     allErrors = false,
-    dryRun = false,
+    dryRun, // unused, just for rest siblings
     allowUnusedKeywords = opts.mode === 'lax',
     allowUnreachable = opts.mode === 'lax',
     requireValidation = opts.mode === 'strong',