fix(build-main): changed expected node version to 10 in gh-deploy script

[SuperITMan]

ISSUES CLOSED: #1485

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?

[X] Bugfix
[ ] 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?

The node_version expected by the "gh-deploy.sh" script is 8.
We forgot to change the expected node version when we removed support for Node 8 in #1447

Issue Number: #1485

What is the new behavior?

The expected node_version is 10.

Does this PR introduce a breaking change?

[ ] Yes
[X] No

Other information

[coveralls]

Coverage remained the same at 94.068% when pulling ce3819b on SuperITMan:bugfix/fix-ghpages-deploy into 56b84f8 on NationalBankBelgium:master.

[nicanac]

Nice, thank you