Update DNS dependency and load system default DNS config on all supported platforms #152
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This simple PR updates the DNS dependency to take advantage of the new config loader to apply the system default DNS config on all supported platforms. The previous default DNS server
8.8.8.8
will only be used as a fallback if no other DNS server could be found.Also, this PR targets reactphp/dns#96 which removed the dependency from react/dns to react/socket, which in turn depends on react/dns again. By removing this cyclic dependency, we can ensure Composer will automatically and correctly pick the latest installed version without having to specify the root package version. This change includes documentation updates and effectively reverts (the bad) parts of #54.
Resolves / closes #90
Refs reactphp/dns#93
Refs reactphp/dns#96