Switched default CDN from unpkg to jsdelivr per #743 (#744)

Author: Balearica

README.md

@@ -102,7 +102,7 @@ Tesseract.js works with a `<script>` tag via local copy or CDN, with webpack via
 ### CDN
 ```html
 <!-- v4 -->
-<script src='https://unpkg.com/tesseract.js@4.0.2/dist/tesseract.min.js'></script>
+<script src='https://cdn.jsdelivr.net/npm/tesseract.js@4/dist/tesseract.min.js'></script>
 ```
 After including the script the `Tesseract` variable will be globally available.
 

docs/local-installation.md

@@ -10,19 +10,19 @@ In Node.js environment, the only path you may want to customize is languages/lan
 
 ```javascript
 Tesseract.recognize(image, langs, {
-  workerPath: 'https://unpkg.com/tesseract.js@v4.0.3/dist/worker.min.js',
+  workerPath: 'https://cdn.jsdelivr.net/npm/tesseract.js@v4.0.3/dist/worker.min.js',
   langPath: 'https://tessdata.projectnaptha.com/4.0.0',
-  corePath: 'https://unpkg.com/tesseract.js-core@v4.0.3/tesseract-core.wasm.js',
+  corePath: 'https://cdn.jsdelivr.net/npm/tesseract.js-core@v4.0.3/tesseract-core.wasm.js',
 })
 ```
 
 Or
 
 ```javascript
 const worker = await createWorker({
-  workerPath: 'https://unpkg.com/tesseract.js@v4.0.3/dist/worker.min.js',
+  workerPath: 'https://cdn.jsdelivr.net/npm/tesseract.js@v4.0.3/dist/worker.min.js',
   langPath: 'https://tessdata.projectnaptha.com/4.0.0',
-  corePath: 'https://unpkg.com/tesseract.js-core@v4.0.3/tesseract-core.wasm.js',
+  corePath: 'https://cdn.jsdelivr.net/npm/tesseract.js-core@v4.0.3/tesseract-core.wasm.js',
 });
 ```
 
@@ -33,4 +33,4 @@ A string specifying the location of the `worker.js` file.
 A string specifying the location of the tesseract language files, with default value 'https://tessdata.projectnaptha.com/4.0.0'. Language file URLs are calculated according to the formula `langPath + langCode + '.traineddata.gz'`.
 
 ### corePath
-A string specifying the location of the [tesseract.js-core library](https://github.com/naptha/tesseract.js-core), with default value 'https://unpkg.com/tesseract.js-core@v4.0.3/tesseract-core.wasm.js'.
+A string specifying the location of the [tesseract.js-core library](https://github.com/naptha/tesseract.js-core), with default value 'https://cdn.jsdelivr.net/npm/tesseract.js-core@v4.0.3/tesseract-core.wasm.js'.

src/worker-script/browser/getCore.js

@@ -11,9 +11,9 @@ module.exports = async (corePath, res) => {
     if (!corePathImport) {
       const simdSupport = await simd();
       if (simdSupport) {
-        corePathImport = `https://unpkg.com/tesseract.js-core@v${dependencies['tesseract.js-core'].substring(1)}/tesseract-core-simd.wasm.js`;
+        corePathImport = `https://cdn.jsdelivr.net/npm/tesseract.js-core@v${dependencies['tesseract.js-core'].substring(1)}/tesseract-core-simd.wasm.js`;
       } else {
-        corePathImport = `https://unpkg.com/tesseract.js-core@v${dependencies['tesseract.js-core'].substring(1)}/tesseract-core.wasm.js`;
+        corePathImport = `https://cdn.jsdelivr.net/npm/tesseract.js-core@v${dependencies['tesseract.js-core'].substring(1)}/tesseract-core.wasm.js`;
       }
     }
 

src/worker/browser/defaultOptions.js

@@ -9,7 +9,7 @@ module.exports = {
   ...defaultOptions,
   workerPath: (typeof process !== 'undefined' && process.env.TESS_ENV === 'development')
     ? resolveURL(`/dist/worker.dev.js?nocache=${Math.random().toString(36).slice(3)}`)
-    : `https://unpkg.com/tesseract.js@v${version}/dist/worker.min.js`,
+    : `https://cdn.jsdelivr.net/npm/tesseract.js@v${version}/dist/worker.min.js`,
   /*
    * If browser doesn't support WebAssembly,
    * load ASM version instead