fix: correct build compilation failure (#28)

tsconfig.build.json

@@ -0,0 +1,30 @@
+{
+  "compilerOptions": {
+    "target": "es5",
+    "module": "es2015",
+    "moduleResolution": "node",
+    "lib": ["es2015", "dom"],
+    "outDir": "dist",
+    "isolatedModules": false,
+    "experimentalDecorators": true,
+    "emitDecoratorMetadata": true,
+    "noImplicitAny": true,
+    "noImplicitUseStrict": false,
+    "noEmitHelpers": false,
+    "noLib": false,
+    "noUnusedLocals": true,
+    "noEmitOnError": true,
+    "allowSyntheticDefaultImports": false,
+    "skipLibCheck": true,
+    "skipDefaultLibCheck": true,
+    "strict": true,
+    "strictNullChecks": true,
+    "strictFunctionTypes": true,
+    "forceConsistentCasingInFileNames": true,
+    "declaration": true,
+    "sourceMap": true
+  },
+  "include": [
+    "src/**/*.ts"
+  ]
+}

tsconfig.json

@@ -1,7 +1,7 @@
 {
   "compilerOptions": {
     "target": "es5",
-    "module": "es2015",
+    "module": "commonjs",
     "moduleResolution": "node",
     "lib": ["es2015", "dom"],
     "outDir": "dist",