fix(core): ensure sanitizer works if DOMParser return null body
fix(common): add right ContentType for boolean values with HttpClient request body currently a boolean as body is seen as text/plain, where is should be seen as application/json, since it is valid JSON, like numbers
fix(platform-browser): prevent memory leak of style nodes if shadow DOM encapsulation is used
fix(core): fix possible XSS attack in development through SSR