Query parameters encoding issue with special characters (Terraform provider use case)

[francescobianco]

Query parameters encoding issue with special characters (Terraform provider use case)

Description
When used inside a Terraform provider, query params with special characters are not encoded properly.

Code snippet

params := map[string]string{
    "denominazione": "azienda & co",
}

_, err := apiClient.Request(ctx, "GET", baseURL, "/advance", nil, params)

Observed behavior
API returns 400 due to malformed query string.