Unmet peer dependency with ngx-webstorage but don't want to update to Angular 5.0.0 - node.js

Question

I'm trying to build a project that someone else has created but got the unmet dependency issue.
The NPM install command complains taht ngx-webstorage needs angular 5.0.0 and I indeed did not install 5.0.0 since the rest of the project cannot use that yet.
I globally installed node version 6.12 and have angular CLI version 3.10
$ which npm
/usr/bin/npm
$ npm --version
3.10.10
$ which ng
/usr/bin/ng
$ ng --version
_ _ ____ _ ___
/ \ _ __ __ _ _ _| | __ _ _ __ / ___| | |_ _|
/ △ \ | '_ \ / _` | | | | |/ _` | '__| | | | | | |
/ ___ \| | | | (_| | |_| | | (_| | | | |___| |___ | |
/_/ \_\_| |_|\__, |\__,_|_|\__,_|_| \____|_____|___|
|___/
Angular CLI: 1.6.2
Node: 6.12.0
OS: linux x64
Angular:
...
I used the globally installed npm to install the dependencies and then see the "requires a peer of " message.
$ npm install
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents#^1.0.0 (node_modules/chokidar/node_modules/fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents#1.1.3: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})
npm WARN ngx-webstorage#2.0.1 requires a peer of #angular/core#^5.0.0 but none was installed.
npm WARN ng2-pop-over#0.9.37 requires a peer of #angular/core#^2.4.0 but none was installed.
npm WARN ng2-pop-over#0.9.37 requires a peer of zone.js#^0.7.2 but none was installed.
npm WARN ng2-accordion#0.0.15 requires a peer of #angular/core#^2.0.0 but none was installed.
npm WARN #schematics/angular#0.0.49 requires a peer of #angular-devkit/schematics#0.0.34 but none was installed.
Here's the package.json
{
"name": "perkin-elmer",
"version": "0.0.0",
"license": "MIT",
"scripts": {
"ng": "ng",
"prestart": "npm install",
"start": "ng serve --proxy-config proxy.config.json",
"build": "ng build",
"test": "ng test",
"lint": "ng lint",
"e2e": "ng e2e"
},
"private": true,
"dependencies": {
"#angular/animations": "^4.2.4",
"#angular/common": "^4.2.4",
"#angular/compiler": "^4.2.4",
"#angular/core": "^4.2.4",
"#angular/forms": "^4.2.4",
"#angular/http": "^4.2.4",
"#angular/platform-browser": "^4.2.4",
"#angular/platform-browser-dynamic": "^4.2.4",
"#angular/router": "^4.2.4",
"#types/underscore": "^1.8.6",
"ag-grid": "^13.3.1",
"ag-grid-angular": "^13.3.0",
"angular-2-dropdown-multiselect": "^1.6.3",
"angular2-multiselect-checkbox-dropdown": "^1.5.0",
"bootstrap": "^3.3.7",
"core-js": "^2.4.1",
"jquery": "^2.2.4",
"lodash": "^4.17.4",
"ng-dynamic-component": "^1.1.0",
"ng2-accordion": "0.0.15",
"ng2-bootstrap-modal": "^1.0.1",
"ng2-pop-over": "^0.9.37",
"ngx-treeview": "^1.2.5",
"ngx-webstorage": "^2.0.1",
"rxjs": "^5.4.2",
"underscore": "^1.8.3",
"zone.js": "^0.8.14"
},
"devDependencies": {
"#angular/cli": "1.4.5",
"#angular/compiler-cli": "^4.2.4",
"#angular/language-service": "^4.2.4",
"#types/jasmine": "~2.5.53",
"#types/jasminewd2": "~2.0.2",
"#types/lodash": "^4.14.91",
"#types/node": "~6.0.60",
"codelyzer": "~3.2.0",
"jasmine-core": "~2.6.2",
"jasmine-spec-reporter": "~4.1.0",
"karma": "~1.7.0",
"karma-chrome-launcher": "~2.1.1",
"karma-cli": "~1.0.1",
"karma-coverage-istanbul-reporter": "^1.2.1",
"karma-jasmine": "~1.1.0",
"karma-jasmine-html-reporter": "^0.2.2",
"protractor": "~5.1.2",
"ts-node": "~3.2.0",
"tslint": "~5.7.0",
"typescript": "~2.3.3"
}
}
Since I did not develop the package, I am not sure why the ngx-webstorage was set to require version 2.0.1, which needs angular 5.0.0 since that clearly does not correspond to the rest of the angular versions requirements since those are still 4 in all cases.
I checked the npm site for the requirements for ngx-webstorage 2.0.1 and indeed the devDependencies is 5.0.0, but how could this package.json ever have worked? I know it works, since the app is running on some other site...
Any help is appreciated.

Answer 1

Appearantly, ngx-webstorage is abandoned. ( See: https://github.com/PillowPillow/ng2-webstorage/pull/91)
Use Angular 6 compatible fork of ngx-webstorage: https://www.npmjs.com/package/#rars/ngx-webstorage/v/3.0.0
npm install #rars/ngx-webstorage --save