fix: load version programmatically

Author: farfromrefug

src/version.ts

@@ -1,3 +1,3 @@
 export const SDK_PACKAGE_NAME = 'npm:@nativescript-community/sentry';
 export const SDK_NAME = 'sentry.nativescript';
-export const SDK_VERSION = '4.6.1';
+export const SDK_VERSION = require('package.json').version;