test: update jest config to include i18n directory

jest.config.json

@@ -1,15 +1,47 @@
 {
   "preset": "ts-jest",
   "testEnvironment": "node",
-  "testMatch": ["<rootDir>/tests/**/*.test.ts"],
+  "testMatch": [
+    "<rootDir>/tests/**/*.test.ts"
+  ],
   "transform": {
-    "^.+\\.tsx?$": ["ts-jest", { "tsconfig": "tsconfig.json", "diagnotics": true }]
+    "^.+\\.tsx?$": [
+      "ts-jest",
+      {
+        "tsconfig": "tsconfig.json",
+        "diagnotics": true
+      }
+    ]
   },
-  "moduleFileExtensions": ["ts", "tsx", "js", "jsx", "json", "node"],
-  "testPathIgnorePatterns": ["<rootDir>/node_modules/", "<rootDir>/public/"],
+  "moduleFileExtensions": [
+    "ts",
+    "tsx",
+    "js",
+    "jsx",
+    "json",
+    "node"
+  ],
+  "testPathIgnorePatterns": [
+    "<rootDir>/node_modules/",
+    "<rootDir>/public/"
+  ],
   "collectCoverage": true,
   "coverageDirectory": "coverage",
-  "collectCoverageFrom": ["<rootDir>/api/**/*.ts", "<rootDir>/scripts/**/*.ts", "<rootDir>/src/**/*.ts", "<rootDir>/themes/**/*.ts"],
-  "coverageReporters": ["lcov", "text", "clover", "html"],
-  "coveragePathIgnorePatterns": ["<rootDir>/node_modules/", "<rootDir>/public/"]
+  "collectCoverageFrom": [
+    "<rootDir>/api/**/*.ts",
+    "<rootDir>/scripts/**/*.ts",
+    "<rootDir>/src/**/*.ts",
+    "<rootDir>/themes/**/*.ts",
+    "<rootDir>/i18n/**/*.ts"
+  ],
+  "coverageReporters": [
+    "lcov",
+    "text",
+    "clover",
+    "html"
+  ],
+  "coveragePathIgnorePatterns": [
+    "<rootDir>/node_modules/",
+    "<rootDir>/public/"
+  ]
 }