Parse access_token independently of its position in response (dns_nic.sh)

[dagababaev]

Response of nic.ru API was changed and now access_token return in 1st position. Latest version of dns_nic.sh doesn't parse it correctly. Current sample of response: {"access_token":"#TOKEN#","token_type":"Bearer","expires_in":14400}

I was change script and now it parse access_token independently of its position in response

[Neilpang]

please fix the CI checks: https://github.com/acmesh-official/acme.sh/wiki/DNS-API-Test

[Neilpang]

https://github.com/acmesh-official/acme.sh/wiki/DNS-API-Test