After some troubleshooting, it became clear that I needed to upgrade Angular to version 6.x.x in order to properly use rxjs 6.x.x. This also meant updating angulartics2 to the latest version.
Here is my updated package.json file:
{
"name": "flow-app",
"version": "1.1.0",
"license": "MIT",
"scripts": {
"ng": "ng",
"start": "ng serve",
"build": "ng build",
"test": "ng test",
"lint": "ng lint",
"e2e": "ng e2e",
"build:preprod": "ng build --prod --source-map --configuration=preprod --base-href /dist/",
"build:prod": "ng build --prod --build-optimizer --configuration=production --base-href /dist/"
},
"private": true,
"dependencies": {
"@angular/animations": "^6.1.0",
"@angular/cdk": "^6.0.0",
"@angular/common": "^6.1.0",
"@angular/compiler": "^6.1.0",
"@angular/core": "^6.1.0",
"@angular/forms": "^6.1.0",
"@angular/http": "^6.0.0",
"@angular/material": "^6.2.5",
"@angular/platform-browser": "^6.0.0",
"@angular/platform-browser-dynamic": "^6.0.0",
"@angular/router": "^6.0.0",
"@ng-bootstrap/ng-bootstrap": "^1.0.0-beta.7",
"ajv": "^6.10.0",
"angulartics2": "^7.0.1",
"classlist.js": "^1.1.20150312",
"core-js": "^2.4.1",
"ng2-opd-popup": "^1.1.21",
"rxjs": "^6.4.0",
"rxjs-compat": "^6.4.0",
"web-animations-js": "^2.3.1",
"zone.js": "^0.8.14"
},
"devDependencies": {
"@angular-devkit/build-angular": "^0.13.4",
"@angular/cli": "^6.2.3",
"@angular/compiler-cli": "^5.0.0",
"@angular/language-service": "^5.0.0",
"@types/jasmine": "~2.5.53",
"@types/jasminewd2": "~2.0.2",
"@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": "^5.4.2",
"ts-node": "~3.2.0",
"tslint": "~5.7.0",
"typescript": "^2.9.2"
}
}