feat(stark-all): upgrade to TypeScript 3.2 (latest version supported in Angular 7.2)

[christophercr]

ISSUES CLOSED: #1234

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/NationalBankBelgium/stark/blob/master/CONTRIBUTING.md#-commit-message-guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[ ] Bugfix
[X] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Other... Please describe:

What is the current behavior?

Issue Number: #1234

What is the new behavior?

• upgraded typescript to version 3.2.4
• upgraded @angular/flex-layout to latest version (7.0.0-beta.24) since it depends on TS 3.2
• removed @angular/flex-layout from greenkeeper.json exclusions
• fix minor issues due to new deprecations in TypeSscript 3.2 DOM API
• removed some unnecessary types that are inferrable
• added missing RBAC tests in npm test:ci:all script
• fixed wrong code coverage report generation path in karma CI config (bug introduced in refactor(stark-all): replace 'lodash' by tree-shakeable 'lodash-es'. Add '@types/lodash-es' to get correct typings. #1147)

IMPORTANT
The new strictBindCallApply option in TS 3.2 is not added to packages/stark-build/tsconfig.json to avoid having a breaking change in all the apps whose tsconfig extend from this one so they are not forced to use TS 3.2. This is not an issue because the strict option is enabled so the new strictBindCallApply will be enalbled automatically in case the TypeScript version is 3.2 or higher. See https://github.com/Microsoft/TypeScript/wiki/What%27s-new-in-TypeScript#strictbindcallapply

Does this PR introduce a breaking change?

[ ] Yes
[X] No

[coveralls]

Coverage increased (+2.08%) to 94.819% when pulling 8d656e6 on christophercr:feature/typescript-3.2 into 8bae536 on NationalBankBelgium:master.