feat: Add possibility to create multiple logger instances

Closes #3

Author: MarcSchaetz

src/logger.ts

@@ -111,3 +111,22 @@ export class VueLogger {
   isValidOptions(options: ILoggerOptions, logLevels: string[]): boolean {
     return isValidOptions(options, logLevels);
   }
+
+  static register(key: string) {
+    return {
+      // eslint-disable-next-line
+      install: (Vue: any, options: ILoggerOptions) => {
+        options = Object.assign(getDefaultOptions(), options);
+        if (isValidOptions(options, LOG_LEVELS)) {
+          Vue.provide(key, createLogger(options));
+        } else {
+          throw ERROR_MSG;
+        }
+      },
+    };
+  }
+}
+
+export function createLogger(options: ILoggerOptions): VueLoggerInstance {
+  return new VueLoggerInstance(options);
+}