feat: impliment getSelftRect method for Arc

tsconfig.json

@@ -3,6 +3,7 @@
     "outDir": "lib",
     "module": "ES2015",
     "target": "ES2015",
+    "sourceMap": true,
     "noEmitOnError": true,
     "lib": ["ES2015", "dom"],
     "moduleResolution": "node",
@@ -11,5 +12,5 @@
     // "noImplicitAny": true,
     // "strict": true
   },
-  "include": ["./src/*.ts"]
+  "include": ["./src/**/*.ts"]
 }