Revert tesseract.js to tesseract.js@2.0.0-alpha.16 (mastodon#14262)

The OCR feature in master is broken, there are several reasons for this:
- naptha/tesseract.js#369
- naptha/tesseract.js#346
- and the fact that the worker JS file is served with an unversioned URL,
  and, in the nginx config we provide, served with
  "public, max-age=31536000, immutable", leading to version mismatches as
  the old version gets cached

package.json

@@ -157,7 +157,7 @@
     "stringz": "^2.1.0",
     "substring-trie": "^1.0.2",
     "terser-webpack-plugin": "^3.0.6",
-    "tesseract.js": "^2.1.1",
+    "tesseract.js": "2.0.0-alpha.16",
     "throng": "^4.0.0",
     "tiny-queue": "^0.2.1",
     "uuid": "^8.2.0",

yarn.lock

@@ -2219,6 +2219,14 @@ axe-core@^3.5.4:
   resolved "https://registry.yarnpkg.com/axe-core/-/axe-core-3.5.5.tgz#84315073b53fa3c0c51676c588d59da09a192227"
   integrity sha512-5P0QZ6J5xGikH780pghEdbEKijCTrruK9KxtPZCFWUpef0f6GipO+xEZ5GKCb020mmqgbiNO6TcA55CriL784Q==
 
+axios@^0.18.0:
+  version "0.18.1"
+  resolved "https://registry.yarnpkg.com/axios/-/axios-0.18.1.tgz#ff3f0de2e7b5d180e757ad98000f1081b87bcea3"
+  integrity sha512-0BfJq4NSfQXd+SkFdrvFbG7addhYSBA2mQwISr46pD6E5iqkWg02RAs8vyTT/j0RTnoYmeXauBuSv1qKwR179g==
+  dependencies:
+    follow-redirects "1.5.10"
+    is-buffer "^2.0.2"
+
 axios@^0.19.2:
   version "0.19.2"
   resolved "https://registry.yarnpkg.com/axios/-/axios-0.19.2.tgz#3ea36c5d8818d0d5f8a8a97a6d36b86cdc00cb27"
@@ -2875,6 +2883,11 @@ chardet@^0.7.0:
   resolved "https://registry.yarnpkg.com/chardet/-/chardet-0.7.0.tgz#90094849f0937f2eedc2425d0d28a9e5f0cbad9e"
   integrity sha512-mT8iDcrh03qDGRRmoA2hmBJnxpllMR+0/0qlzjqZES6NdiWDcZkCNAk4rPFZ9Q85r27unkiNNg8ZOiwZXBHwcA==
 
+check-types@^7.4.0:
+  version "7.4.0"
+  resolved "https://registry.yarnpkg.com/check-types/-/check-types-7.4.0.tgz#0378ec1b9616ec71f774931a3c6516fad8c152f4"
+  integrity sha512-YbulWHdfP99UfZ73NcUDlNJhEIDgm9Doq9GhpyXbF+7Aegi3CVV7qqMCKTTqJxlvEvnQBp9IA+dxsGN6xK/nSg==
+
 check-types@^8.0.3:
   version "8.0.3"
   resolved "https://registry.yarnpkg.com/check-types/-/check-types-8.0.3.tgz#3356cca19c889544f2d7a95ed49ce508a0ecf552"
@@ -4740,10 +4753,10 @@ file-loader@^6.0.0:
     loader-utils "^2.0.0"
     schema-utils "^2.6.5"
 
-file-type@^12.4.1:
-  version "12.4.2"
-  resolved "https://registry.yarnpkg.com/file-type/-/file-type-12.4.2.tgz#a344ea5664a1d01447ee7fb1b635f72feb6169d9"
-  integrity sha512-UssQP5ZgIOKelfsaB5CuGAL+Y+q7EmONuiwF3N5HAH0t27rvrttgi6Ra9k/+DVaY9UF6+ybxu5pOXLUdA8N7Vg==
+file-type@^10.5.0:
+  version "10.11.0"
+  resolved "https://registry.yarnpkg.com/file-type/-/file-type-10.11.0.tgz#2961d09e4675b9fb9a3ee6b69e9cd23f43fd1890"
+  integrity sha512-uzk64HRpUZyTGZtVuvrjP0FYxzQrBf4rojot6J65YMEbwBLB0CWm0CLojVpwpmFmxcE/lkvYICgfcGozbBq6rw==
 
 file-uri-to-path@1.0.0:
   version "1.0.0"
@@ -5528,7 +5541,7 @@ icss-utils@^4.0.0, icss-utils@^4.1.1:
   dependencies:
     postcss "^7.0.14"
 
-idb-keyval@^3.2.0:
+idb-keyval@^3.1.0:
   version "3.2.0"
   resolved "https://registry.yarnpkg.com/idb-keyval/-/idb-keyval-3.2.0.tgz#cbbf354deb5684b6cdc84376294fc05932845bd6"
   integrity sha512-slx8Q6oywCCSfKgPgL0sEsXtPVnSbTLWpyiDcu6msHOyKOLari1TD1qocXVCft80umnkk3/Qqh3lwoFt8T/BPQ==
@@ -5846,6 +5859,11 @@ is-binary-path@~2.1.0:
   dependencies:
     binary-extensions "^2.0.0"
 
+is-buffer@^2.0.2:
+  version "2.0.4"
+  resolved "https://registry.yarnpkg.com/is-buffer/-/is-buffer-2.0.4.tgz#3e572f23c8411a5cfd9557c849e3665e0b290623"
+  integrity sha512-Kq1rokWXOPXWuaMAqZiJW4XxsmD9zGx9q4aePabbn3qCRGedtH7Cm+zV8WETitMfu1wdh+Rvd6w5egwSngUX2A==
+
 is-callable@^1.1.4, is-callable@^1.2.0:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/is-callable/-/is-callable-1.2.0.tgz#83336560b54a38e35e3a2df7afd0454d691468bb"
@@ -5917,11 +5935,6 @@ is-docker@^2.0.0:
   resolved "https://registry.yarnpkg.com/is-docker/-/is-docker-2.0.0.tgz#2cb0df0e75e2d064fe1864c37cdeacb7b2dcf25b"
   integrity sha512-pJEdRugimx4fBMra5z2/5iRdZ63OhYV0vr0Dwm5+xtW4D1FvRkB8hamMIhnWfyJeDdyr/aa7BDyNbtG38VxgoQ==
 
-is-electron@^2.2.0:
-  version "2.2.0"
-  resolved "https://registry.yarnpkg.com/is-electron/-/is-electron-2.2.0.tgz#8943084f09e8b731b3a7a0298a7b5d56f6b7eef0"
-  integrity sha512-SpMppC2XR3YdxSzczXReBjqs2zGscWQpBIKqwXYBFic0ERaxNVgwLCHwOLZeESfdJQjX0RDvrJ1lBXX2ij+G1Q==
-
 is-extendable@^0.1.0, is-extendable@^0.1.1:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/is-extendable/-/is-extendable-0.1.1.tgz#62b110e289a471418e3ec36a617d472e301dfc89"
@@ -6107,6 +6120,11 @@ is-typedarray@^1.0.0, is-typedarray@~1.0.0:
   resolved "https://registry.yarnpkg.com/is-typedarray/-/is-typedarray-1.0.0.tgz#e479c80858df0c1b11ddda6940f96011fcda4a9a"
   integrity sha1-5HnICFjfDBsR3dppQPlgEfzaSpo=
 
+is-url@1.2.2:
+  version "1.2.2"
+  resolved "https://registry.yarnpkg.com/is-url/-/is-url-1.2.2.tgz#498905a593bf47cc2d9e7f738372bbf7696c7f26"
+  integrity sha1-SYkFpZO/R8wtnn9zg3K792lsfyY=
+
 is-url@^1.2.4:
   version "1.2.4"
   resolved "https://registry.yarnpkg.com/is-url/-/is-url-1.2.4.tgz#04a4df46d28c4cff3d73d01ff06abeb318a1aa52"
@@ -7367,11 +7385,6 @@ nice-try@^1.0.4:
   resolved "https://registry.yarnpkg.com/nice-try/-/nice-try-1.0.5.tgz#a3378a7696ce7d223e88fc9b764bd7ef1089e366"
   integrity sha512-1nh45deeb5olNY7eX82BkPO7SSxR5SSYJiPTrTdFUVYwAl8CKMA5N9PjTYkHiRjisVcxcQ1HXdLhx2qxxJzLNQ==
 
-node-fetch@^2.6.0:
-  version "2.6.0"
-  resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-2.6.0.tgz#e633456386d4aa55863f676a7ab0daa8fdecb0fd"
-  integrity sha512-8dG4H5ujfvFiqDmVu9fQ5bOHUC15JMjMY/Zumv26oOvvVJjM67KF8koCWIabKQ1GJIa9r2mMZscBq/TbdOcmNA==
-
 node-forge@0.9.0:
   version "0.9.0"
   resolved "https://registry.yarnpkg.com/node-forge/-/node-forge-0.9.0.tgz#d624050edbb44874adca12bb9a52ec63cb782579"
@@ -9193,7 +9206,7 @@ regenerator-runtime@^0.12.0:
   resolved "https://registry.yarnpkg.com/regenerator-runtime/-/regenerator-runtime-0.12.1.tgz#fa1a71544764c036f8c49b13a08b2594c9f8a0de"
   integrity sha512-odxIc1/vDlo4iZcfXqRYFj0vpXFNoGdKMAUieAlFYO6m/nl5e9KR/beGf41z4a1FI+aQgtjhuaSlDxQ0hmkrHg==
 
-regenerator-runtime@^0.13.3, regenerator-runtime@^0.13.4:
+regenerator-runtime@^0.13.4:
   version "0.13.5"
   resolved "https://registry.yarnpkg.com/regenerator-runtime/-/regenerator-runtime-0.13.5.tgz#d878a1d094b4306d10b9096484b33ebd55e26697"
   integrity sha512-ZS5w8CpKFinUzOwW3c83oPeVXoNsrLsaCoLtJvAClH135j/R77RuymhiSErhm2lKcwSCIpmvIWSbDkIfAqKQlA==
@@ -10517,27 +10530,35 @@ terser@^4.1.2, terser@^4.8.0:
     source-map "~0.6.1"
     source-map-support "~0.5.12"
 
-tesseract.js-core@^2.2.0:
+tesseract.js-core@^2.0.0-beta.12:
   version "2.2.0"
   resolved "https://registry.yarnpkg.com/tesseract.js-core/-/tesseract.js-core-2.2.0.tgz#6ef78051272a381969fac3e45a226e85022cffef"
   integrity sha512-a8L+OJTbUipBsEDsJhDPlnLB0TY1MkTZqw5dqUwmiDSjUzwvU7HWLg/2+WDRulKUi4LE+7PnHlaBlW0k+V0U0w==
 
-tesseract.js@^2.1.1:
-  version "2.1.1"
-  resolved "https://registry.yarnpkg.com/tesseract.js/-/tesseract.js-2.1.1.tgz#5c50fc95542ce8d834cb952bfb75a8fc85f1441d"
-  integrity sha512-utg0A8UzT1KwBvZf+UMGmM8LU6izeol6yIem0Z44+7Qqd/YWgRVQ99XOG18ApTOXX48lGE++PDwlcZYkv0ygRQ==
+tesseract.js-utils@^1.0.0-beta.8:
+  version "1.0.0-beta.8"
+  resolved "https://registry.yarnpkg.com/tesseract.js-utils/-/tesseract.js-utils-1.0.0-beta.8.tgz#d1ef25c12609a337c3e0ac12a33f9903f3145a68"
+  integrity sha512-qjHBfWfzo2o1ZY9XI0Wh2hmpp38+mIgCMOk60W5Yyie/pBl421VLBKOZUEwQgpbLnOJ24VU6Q8yXsVgtFFHcFg==
   dependencies:
+    axios "^0.18.0"
     bmp-js "^0.1.0"
-    file-type "^12.4.1"
-    idb-keyval "^3.2.0"
-    is-electron "^2.2.0"
+    file-type "^10.5.0"
+    idb-keyval "^3.1.0"
     is-url "^1.2.4"
-    node-fetch "^2.6.0"
+    zlibjs "^0.3.1"
+
+tesseract.js@2.0.0-alpha.16:
+  version "2.0.0-alpha.16"
+  resolved "https://registry.yarnpkg.com/tesseract.js/-/tesseract.js-2.0.0-alpha.16.tgz#1e17717234a1464481abe12283f2c3ac79603d2e"
+  integrity sha512-8g3je2Kl8rkAFtpmwilGGj+8rCiPClNQaCjW6IafOPNn7hzFnVdL6fU6rG1Xsrc4Twv0HOa75kbpx5u70/WbTA==
+  dependencies:
+    axios "^0.18.0"
+    check-types "^7.4.0"
+    is-url "1.2.2"
     opencollective-postinstall "^2.0.2"
-    regenerator-runtime "^0.13.3"
     resolve-url "^0.2.1"
-    tesseract.js-core "^2.2.0"
-    zlibjs "^0.3.1"
+    tesseract.js-core "^2.0.0-beta.12"
+    tesseract.js-utils "^1.0.0-beta.8"
 
 test-exclude@^6.0.0:
   version "6.0.0"