Update Gems to latest version

[nougad]

activesupport 5.0.2 required to get rid of ruby warnings:

../ruby/2.4.0/gems/activesupport-5.0.1/lib/active_support/xml_mini.rb:51: warning: constant ::Fixnum is deprecated
../ruby/2.4.0/gems/activesupport-5.0.1/lib/active_support/xml_mini.rb:52: warning: constant ::Bignum is deprecated
../ruby/2.4.0/gems/activesupport-5.0.1/lib/active_support/core_ext/numeric/conversions.rb:138: warning: constant ::Fixnum is deprecated

bug: https://bugs.ruby-lang.org/issues/12739 commit: https://github.com/rails/rails/commit/cb0452e9a50e97f8ab2100f6226fbdd47a970a34#diff-3bce0a811b46c709db71dbaccd9e21b1

sinatra 1.4.8 required to get rid of ruby warnings:

../ruby/2.4.0/gems/sinatra-1.4.7/lib/sinatra/base.rb:1226: warning: constant ::Fixnum is deprecated

fixed by: https://github.com/sinatra/sinatra/commit/492628c1529a6ef570087ef714604a136494ebe0

backports (dependency of sinatra-contrib) still shows warnings: https://github.com/marcandre/backports/issues/104

../ruby/2.4.0/gems/backports-3.6.8/lib/backports/1.8.7/fixnum/div.rb:1: warning: constant ::Fixnum is deprecated
../ruby/2.4.0/gems/backports-3.6.8/lib/backports/1.8.7/fixnum/fdiv.rb:1: warning: constant ::Fixnum is deprecated
../ruby/2.4.0/gems/backports-3.6.8/lib/backports/2.1.0/bignum/bit_length.rb:1: warning: constant ::Bignum is deprecated
../ruby/2.4.0/gems/backports-3.6.8/lib/backports/2.1.0/fixnum/bit_length.rb:1: warning: constant ::Fixnum is deprecated

[valpackett]

Thanks!