0.27.0 support

[Blacksmoke16]

This fixes the epoch to unix breaking change. Also updates deps to the 0.27.0 releases as well.

Running make test throw this error tho

crystal run test/test_helper.cr test/**/*_test.cr -- --chaos
Module validation failed: !dbg attachment points at wrong subprogram for function
!10 = distinct !DISubprogram(name: "initialize", linkageName: "initialize", scope: !5, file: !5, line: 115, type: !6, isLocal: true, isDefinition: true, scopeLine: 115, isOptimized: false, unit: !0, variables: !2)
void (%"OpenSSL::BIO"*, %TCPSocket*)* @"*OpenSSL::BIO#initialize<TCPSocket>:Nil"
  %2 = call i8** @"~OpenSSL::BIO::CRYSTAL_BIO:read"(), !dbg !12
!12 = !DILocation(line: 14, column: 5, scope: !13)
!13 = distinct !DISubprogram(name: "set_data", linkageName: "set_data", scope: !5, file: !5, line: 13, type: !6, isLocal: true, isDefinition: true, scopeLine: 13, isOptimized: false, unit: !0, variables: !2)
!13 = distinct !DISubprogram(name: "set_data", linkageName: "set_data", scope: !5, file: !5, line: 13, type: !6, isLocal: true, isDefinition: true, scopeLine: 13, isOptimized: false, unit: !0, variables: !2)
 (Exception)
  from ???
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Error: you've found a bug in the Crystal compiler. Please open an issue, including source code that will allow us to reproduce the bug: https://github.com/crystal-lang/crystal/issues
Makefile:7: recipe for target 'test' failed
make: *** [test] Error 1

So something is borked in the test portion of code. However, im not sue what it has to do with yet, maybe @robacarp has an idea? Anyway, mosquito will at least compile now.

[robacarp]

@Blacksmoke16 thank you for this!

I was able to reproduce the compiler bug (known issue) causing the test suite to fail, and solve it by moving this line around in test_helper.cr:

require "minitest"
require "minitest/focus"
- require "minitest/autorun"

require "timecop"
Timecop.safe_mode = true

ENV["REDIS_URL"] = "redis://127.0.0.1:6379/3"

require "../mosquito"
require "./helpers/*"

Mosquito::Redis.instance.flushall
+ require "minitest/autorun"

Drop that line to the bottom and it should pass CI :D