Refactor json indent to 2 space

- update .editorconfig
- apply indent to json files

.editorconfig

@@ -8,7 +8,7 @@ trim_trailing_whitespace = true
 insert_final_newline = true
 
 [*.json]
-tab_width = 2
+indent_size = 2
 
 [*.md]
 trim_trailing_whitespace = false

background.tsconfig.json

@@ -1,12 +1,12 @@
 {
-    "extends": "./tsconfig.json",
-    "compilerOptions": {
-        "module": "CommonJS",
-        "noEmit": false,
-        "outDir": "./build/background",
-        "isolatedModules": false
-    },
-    "include": [
-        "background/*"
-    ]
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "module": "CommonJS",
+    "noEmit": false,
+    "outDir": "./build/background",
+    "isolatedModules": false
+  },
+  "include": [
+    "background/*"
+  ]
 }

manifest.json

@@ -1,21 +1,21 @@
 {
-    "manifest_version": 3,
-    "name": "주소검색",
-    "version": "1.0.8",
-    "description": "대한민국 주소검색 확장 프로그램",
-    "author": "Jaewook Ahn",
-    "icons": {
-        "16": "icons/icon_16.png",
-        "48": "icons/icon_48.png",
-        "128": "icons/icon_128.png"
-    },
-    "permissions": ["storage"],
-    "action": {
-        "default_popup": "index.html",
-        "default_icon": {
-            "16": "icons/icon_16.png",
-            "24": "icons/icon_24.png",
-            "32": "icons/icon_32.png"
-        }
+  "manifest_version": 3,
+  "name": "주소검색",
+  "version": "1.0.8",
+  "description": "대한민국 주소검색 확장 프로그램",
+  "author": "Jaewook Ahn",
+  "icons": {
+    "16": "icons/icon_16.png",
+    "48": "icons/icon_48.png",
+    "128": "icons/icon_128.png"
+  },
+  "permissions": ["storage"],
+  "action": {
+    "default_popup": "index.html",
+    "default_icon": {
+      "16": "icons/icon_16.png",
+      "24": "icons/icon_24.png",
+      "32": "icons/icon_32.png"
     }
+  }
 }