fix(*): make all attributes of PackageJson as optional (#269)

Author: kimusaku

src/index.ts

@@ -121,9 +121,10 @@ export class Escapin {
     moduleName: string,
     location: 'dependencies' | 'devDependencies' = 'dependencies',
   ): void {
-    this.packageJson[location][moduleName] = `^${u.getLatestVersion(
-      moduleName,
-    )}`;
+    const deps = this.packageJson[location];
+    if (deps !== undefined) {
+      deps[moduleName] = `^${u.getLatestVersion(moduleName)}`;
+    }
   }
 
   public savePackageJson(): void {

src/state.ts

@@ -114,6 +114,7 @@ export class BaseState {
     return (
       moduleName in
       Object.assign(
+        new Object(),
         dependencies,
         devDependencies,
         peerDependencies,

src/types.ts

@@ -23,8 +23,8 @@ export interface Credential {
 export interface PackageJson {
   main?: string;
   scripts?: { [script: string]: string };
-  dependencies: { [moduleName: string]: string };
-  devDependencies: { [moduleName: string]: string };
+  dependencies?: { [moduleName: string]: string };
+  devDependencies?: { [moduleName: string]: string };
   peerDependencies?: { [moduleName: string]: string };
   optionalDependencies?: { [moduleName: string]: string };
   bundledDependencies?: string[];

src/visitors/functionTypes/index.ts

@@ -27,7 +27,8 @@ const visitor: Visitor<BaseState> = {
 
     escapin.save();
 
-    const { dependencies, devDependencies } = escapin.packageJson;
+    const dependencies = escapin.packageJson.dependencies || new Object();
+    const devDependencies = escapin.packageJson.devDependencies || new Object();
     const modules = [
       ...Object.keys(dependencies),
       ...Object.keys(devDependencies),