npm install 后出现此错误：
+-- 未满足对等依赖@angular/common@6.1.10
+-- 未满足对等依赖 @angular/core@6.1.10
`--文件保护程序@1.3.8
编译后得到这个错误：
./node_modules/@agm/core/fesm5/agm-core.js 4538:120-128 中的警告“在'@angular/core'中找不到导出'??inject'
./node_modules/@agm/core/fesm5/agm-core.js 4538:34-52 中的警告“在‘@angular/core’中找不到导出‘??defineInjectable’
我的 package.json 是：
{
"name": "web-app",
"version": "2.1.0",
"license": "MIT",
"angular-cli": {},
"scripts": {
"ng": "ng",
"start": "ng serve",
"public": "ng serve --port 8080 --host 0.0.0.0",
"build": "ng build --prod --build-optimizer",
"lint": "tslint \"src/**/*.ts\"",
"test": "ng test",
"pree2e": "webdriver-manager update --standalone false --gecko false",
"e2e": "protractor"
},
"private": true,
"dependencies": {
"@agm/core": "^1.0.0-beta.2",
"@angular/animations": "^6.1.10",
"@angular/cdk": "^6.4.7",
"@angular/common": "^6.1.10",
"@angular/compiler": "^6.1.0",
"@angular/core": …