update gemspec, remove robots requirement

Gemfile.lock

@@ -1,14 +1,13 @@
 PATH
   remote: .
   specs:
-    rex (2.0.11)
-      filesize
-      jsobfu
-      json
-      metasm
-      nokogiri
-      rb-readline
-      robots
+    rex (2.0.12)
+      filesize (~> 0)
+      jsobfu (~> 0)
+      json (~> 2)
+      metasm (~> 1)
+      nokogiri (~> 1)
+      rb-readline (~> 0)
 
 GEM
   remote: https://rubygems.org/
@@ -21,9 +20,8 @@ GEM
     mini_portile2 (2.2.0)
     nokogiri (1.8.0)
       mini_portile2 (~> 2.2.0)
-    rb-readline (0.5.4)
+    rb-readline (0.5.5)
     rkelly-remix (0.0.7)
-    robots (0.10.1)
 
 PLATFORMS
   ruby
@@ -32,4 +30,4 @@ DEPENDENCIES
   rex!
 
 BUNDLED WITH
-   1.15.1
+   1.15.4

rex.gemspec

@@ -1,15 +1,15 @@
 # encoding: utf-8
 
 APP_NAME = "rex"
-VERSION  = "2.0.11"
+VERSION  = "2.0.12"
 
 Gem::Specification.new do |s|
   s.name                  = APP_NAME
   s.version               = VERSION
   s.homepage              = "https://github.com/rapid7/rex/"
   s.summary               = "Ruby Exploitation Library"
   s.description           = "Rex provides a variety of classes useful for security testing and exploit development."
-  s.license               = "BSD"
+  s.license               = "BSD-3-Clause"
   s.authors               = ["HD Moore", "Jacob Hammack"]
   s.email                 = ["x@hdm.io", "jacob.hammack@hammackj.com"]
   s.files                 = Dir['rex.gemspec'] + Dir['examples/**'] + Dir['lib/rex.rb'] + Dir['lib/**/*']
@@ -19,24 +19,20 @@ Gem::Specification.new do |s|
   s.required_ruby_version = ">= 2.2.0"
 
   # Needed for Javascript obfuscation
-  s.add_runtime_dependency 'jsobfu'
+  s.add_runtime_dependency 'jsobfu', '~> 0'
 
   # Needed for some admin modules (scrutinizer_add_user.rb)
-  s.add_runtime_dependency 'json'
+  s.add_runtime_dependency 'json', '~> 2'
 
   # Metasm compiler/decompiler/assembler
-  s.add_runtime_dependency 'metasm'
+  s.add_runtime_dependency 'metasm', '~> 1'
 
   # Needed by anemone crawler
-  s.add_runtime_dependency 'nokogiri'
+  s.add_runtime_dependency 'nokogiri', '~> 1'
 
   # Command line editing, history, and tab completion in msfconsole
-  s.add_runtime_dependency 'rb-readline'
-
-  # Needed by anemone crawler
-  s.add_runtime_dependency 'robots'
+  s.add_runtime_dependency 'rb-readline', '~> 0'
 
   # Needed so that disk size output isn't horrible
-  s.add_runtime_dependency 'filesize'
-
+  s.add_runtime_dependency 'filesize', '~> 0'
 end