feat(js): add destroy method, close #1363

[Mister-Hope]

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[Mister-Hope]

I am unfamilar with react, preact so I am not sure if this is correct, maintainers should pay sepecial attention to my code, thanks.

Since preact returns void when rendering (or "mounting") a component to dom, I make a hacky way to trigger it's unmount lifecycle. And I saw that key listeners with side effects will clear effect when it's being unmounted from @docsearch/react.

BTW, when runing yarn build, I am getting:

@parcel/optimizer-image: Could not optimize image favicon.png: Invalid header 
detected; Not a PNG file
  Error: Invalid header detected; Not a PNG file
      at Object.optimize 
  (/home/mister-hope/projects/docsearch/node_modules/@parcel/optimizer-image/lib/ImageOptimizer.js:88:44)
      at process.processTicksAndRejections 
  (node:internal/process/task_queues:95:5)
      at async PackagerRunner.optimize 
  (/home/mister-hope/projects/docsearch/node_modules/@parcel/core/lib/PackagerRunner.js:364:20)
      at async PackagerRunner.getBundleResult 
  (/home/mister-hope/projects/docsearch/node_modules/@parcel/core/lib/PackagerRunner.js:255:15)
      at async PackagerRunner.getBundleInfo 
  (/home/mister-hope/projects/docsearch/node_modules/@parcel/core/lib/PackagerRunner.js:239:9)
      at async PackagerRunner.run 
  (/home/mister-hope/projects/docsearch/node_modules/@parcel/core/lib/PackagerRunner.js:160:183)
      at async Child.handleRequest 
  (/home/mister-hope/projects/docsearch/node_modules/@parcel/workers/lib/child.js:216:9)
@parcel/optimizer-terser: You must provide the URL of lib/mappings.wasm by 
calling SourceMapConsumer.initialize({ 'lib/mappings.wasm': ... }) before using 
SourceMapConsumer
  Error: You must provide the URL of lib/mappings.wasm by calling 
  SourceMapConsumer.initialize({ 'lib/mappings.wasm': ... }) before using 
  SourceMapConsumer
      at readWasm 
  (/home/mister-hope/projects/docsearch/node_modules/@parcel/optimizer-terser/node_modules/source-map/lib/read-wasm.js:8:13)
      at wasm 
  (/home/mister-hope/projects/docsearch/node_modules/@parcel/optimizer-terser/node_modules/source-map/lib/wasm.js:25:16)
      at 
  /home/mister-hope/projects/docsearch/node_modules/@parcel/optimizer-terser/node_modules/source-map/lib/source-map-consumer.js:264:14
      at process.processTicksAndRejections 
  (node:internal/process/task_queues:95:5)
      at async SourceMap 
  (/home/mister-hope/projects/docsearch/node_modules/@parcel/optimizer-terser/node_modules/terser/dist/bundle.min.js:18277:20)
      at async minify 
  (/home/mister-hope/projects/docsearch/node_modules/@parcel/optimizer-terser/node_modules/terser/dist/bundle.min.js:26612:41)
      at async Object.optimize 
  (/home/mister-hope/projects/docsearch/node_modules/@parcel/optimizer-terser/lib/TerserOptimizer.js:131:16)
      at async PackagerRunner.optimize 
  (/home/mister-hope/projects/docsearch/node_modules/@parcel/core/lib/PackagerRunner.js:364:20)
      at async PackagerRunner.getBundleResult 
  (/home/mister-hope/projects/docsearch/node_modules/@parcel/core/lib/PackagerRunner.js:255:15)
      at async PackagerRunner.getBundleInfo 
  (/home/mister-hope/projects/docsearch/node_modules/@parcel/core/lib/PackagerRunner.js:239:9)
error Command failed with exit code 1.
lerna ERR! yarn run build exited 1 in '@docsearch/react-example'
lerna WARN complete Waiting for 2 child processes to exit. CTRL-C to exit immediately.

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[8bittitan]

@Mister-Hope I know this PR has been sitting for awhile now, but it doesn't seem like this is the correct approach to fixing the issue. A Preact hook has to be used within a Preact component but docsearch is just a wrapper function we expose for being able to render.