Convert indentation to tabs for all JSON files

previewhtml-sample/package.json

@@ -54,4 +54,4 @@
 		"vscode": "^1.1.17",
 		"@types/node": "*"
 	}
-}
+}

previewhtml-sample/tsconfig.json

@@ -3,13 +3,9 @@
 		"module": "commonjs",
 		"target": "es5",
 		"outDir": "out",
-		"lib": [
-			"es6"
-		],
+		"lib": ["es6"],
 		"sourceMap": true,
 		"rootDir": "src"
 	},
-	"exclude": [
-		"node_modules"
-	]
+	"exclude": ["node_modules"]
 }

previewhtml-sample/tslint.json

@@ -1,6 +1,6 @@
 {
-    "rules": {
-        "no-unused-variable": true,
-        "no-unused-expression": true       
-    }
-}
+	"rules": {
+		"no-unused-variable": true,
+		"no-unused-expression": true
+	}
+}