Enable to mask texts (#73)

* chore: reorder options

* feat: enable to mask texts

* feat: add the default mask function

* refactor: rename options to identify the difference between  mask text and mask input

* test: add tests about masking

src/index.ts

@@ -3,6 +3,7 @@ import snapshot, {
   transformAttribute,
   visitSnapshot,
   cleanupSnapshot,
+  needMaskingText,
   IGNORED_NODE,
 } from './snapshot';
 import rebuild, { buildNodeWithSN, addHoverClass } from './rebuild';
@@ -18,5 +19,6 @@ export {
   transformAttribute,
   visitSnapshot,
   cleanupSnapshot,
+  needMaskingText,
   IGNORED_NODE,
 };