fix(deps): fix potential TypeError enumerating supported languages (upd @types/prettier to v2.4.2)

Author: djcsdy

package.json

@@ -49,7 +49,7 @@
     "@types/find-up": "2.1.1",
     "@types/jest": "27.0.3",
     "@types/mkdirp": "1.0.1",
-    "@types/prettier": "1.10.0",
+    "@types/prettier": "2.4.2",
     "cz-conventional-changelog": "3.3.0",
     "husky": "7.0.4",
     "jest": "27.3.1",

src/precise-formatters/prettier.ts

@@ -13,7 +13,7 @@ let PRETTIER_SUPPORTED_FILE_EXTENSIONS: string[] = [];
 getSupportInfo().languages.forEach(language => {
     PRETTIER_SUPPORTED_FILE_EXTENSIONS = [
         ...PRETTIER_SUPPORTED_FILE_EXTENSIONS,
-        ...language.extensions
+        ...(language.extensions ?? [])
     ];
 });
 

yarn.lock

@@ -1022,10 +1022,10 @@
   resolved "https://registry.yarnpkg.com/@types/parse-json/-/parse-json-4.0.0.tgz#2f8bb441434d163b35fb8ffdccd7138927ffb8c0"
   integrity sha512-//oorEZjL6sbPcKUaCdIGlIUeH26mgzimjBB77G6XRgnDl/L5wOnpyBGRe/Mmf5CVW3PwEBE1NjiMZ/ssFh4wA==
 
-"@types/prettier@1.10.0":
-  version "1.10.0"
-  resolved "https://registry.yarnpkg.com/@types/prettier/-/prettier-1.10.0.tgz#5abf1ec0a6e904fe2490cc2068f36a38e4a63c42"
-  integrity sha512-mjEM5uxPvMYg8LLcnmHzMy2G7HFRv7aQtcKslpmHg8SIIQutnLpLfps+1soV2YBlVBFrskR+F6I+nBI9NTh49w==
+"@types/prettier@2.4.2":
+  version "2.4.2"
+  resolved "https://registry.yarnpkg.com/@types/prettier/-/prettier-2.4.2.tgz#4c62fae93eb479660c3bd93f9d24d561597a8281"
+  integrity sha512-ekoj4qOQYp7CvjX8ZDBgN86w3MqQhLE1hczEJbEIjgFEumDy+na/4AJAbLXfgEWFNB2pKadM5rPFtuSGMWK7xA==
 
 "@types/prettier@^2.1.5":
   version "2.4.1"