Add strict to tsconfig.json

Author: wooorm

index.js

@@ -27,14 +27,14 @@ export function size(node, test) {
    */
   function fastSize(node) {
     /** @type {Array.<Node>} */
-    // @ts-ignore Looks like a parent.
+    // @ts-expect-error Looks like a parent.
     const children = (node && node.children) || empty
     let count = 0
     let index = -1
 
     if (children && children.length > 0) {
       while (++index < children.length) {
-        // @ts-ignore Looks like a parent.
+        // @ts-expect-error Looks like a parent.
         if (is(children[index], index, node)) count++
         count += fastSize(children[index])
       }

tsconfig.json

@@ -10,6 +10,7 @@
     "declaration": true,
     "emitDeclarationOnly": true,
     "allowSyntheticDefaultImports": true,
-    "skipLibCheck": true
+    "skipLibCheck": true,
+    "strict": true
   }
 }