fix: 🎨 updated gin to 1.7.4 to fix CVE-2020-28483

[melnikovio]

Update Gin to 1.7.4 to fix CVE-2020-28483

Details from Dependency Check:

This affects all versions of package github.com/gin-gonic/gin. When gin is exposed directly to the internet, a client's IP can be spoofed by setting the X-Forwarded-For header.
CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')

CVSSv2:
Base Score: MEDIUM (5.8)
Vector: /AV:N/AC:M/Au:N/C:P/I:P/A:N
CVSSv3:
Base Score: HIGH (7.1)
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N

References:
MISC - gin-gonic/gin#2474
MISC - https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMGINGONICGIN-1041736
Vulnerable Software & Versions:

cpe:2.3:a:gin-gonic:gin:::::::: versions up to (excluding) 1.7.0

[bogdandrutu]

@rs please merge and create a new tag release if possible :)

[ndeweerd-seek]

1.7.4 did not fix CVE-2020-28483

Please update this to 1.7.7.

[yuina1056]

Created a corresponding pull request.
#124

[rs]

Fixed in master