Update axios in @heml/elements to avoid security alert

[juliakaltenegger]

Axios <= 0.18.0 causes high severity security alert (see CVE below). Version ^0.17.0 is specified as a dependency in @heml/elements.

heml/packages/heml-elements/package.json

Line 26 in 78cd0d7

"axios": "^0.17.0",

CVE

Security Alert: high severity

Vulnerable versions: <= 0.18.0
Patched version: 0.18.1

Axios up to and including 0.18.0 allows attackers to cause a denial of service (application crash) by continuing to accepting content after maxContentLength is exceeded.

CVE-2019-10742