solve 1.9 spec failures, that occur on default Travis env

.travis.yml

@@ -1,18 +1,21 @@
 rvm:
-  - 1.9.2
-  - 1.9.3
-  - 2.0.0
+  - 1.9
+  - 2.0
   - 2.1
   - 2.2
-  - 2.3.1
+  - 2.3
   - 2.4
   - ruby-head
-  - rbx-2
+  - rbx-3.69
   - jruby
   - jruby-head
 
+install:
+  - ruby -S gem install bundler --version 1.15.4
+  - ruby -S bundle _1.15.4_ install --without docs
+
 script:
-  - rake spec
+  - ruby -S bundle _1.15.4_ exec rspec
 
 sudo: false
 
@@ -20,7 +23,8 @@ matrix:
   allow_failures:
     - rvm: ruby-head
     - rvm: jruby-head
-    - rvm: rbx-2
+    - rvm: rbx-3.69
+    - rvm: 2.4 # https://bugs.ruby-lang.org/issues/13537
 
 notifications:
   irc: "irc.freenode.org#pry"

lib/pry/version.rb

@@ -1,3 +1,3 @@
 class Pry
-  VERSION = "0.10.4"
+  VERSION = "0.11.0"
 end