Bump dependencies to avoid SIGABORT with Xcode 9

xcodeproj-1.1.0 was using a private framework from within Xcode.app
bundle to generate the xcodeproj (using ffi to call Apple's private
C/ObjC library). That private framework was updated in Xcode 9 and
its API has changed, leading to a SIGABORT during the ffi call if
Xcode 9 was xcode-select'd.

More recent versions of xcodeproj fixed that problem by not relying
on that private framework anymore, using the nanaimo gem instead

Gemfile.lock

@@ -1,39 +1,30 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (4.2.6)
-      i18n (~> 0.7)
-      json (~> 1.7, >= 1.7.7)
-      minitest (~> 5.1)
-      thread_safe (~> 0.3, >= 0.3.4)
-      tzinfo (~> 1.1)
-    claide (1.0.0)
-    colored (1.2)
-    diff-lcs (1.2.5)
+    CFPropertyList (2.3.5)
+    claide (1.0.2)
+    colored2 (3.1.2)
+    diff-lcs (1.3)
     highline (1.7.8)
-    i18n (0.7.0)
-    json (1.8.3)
-    minitest (5.9.0)
-    rspec (3.4.0)
-      rspec-core (~> 3.4.0)
-      rspec-expectations (~> 3.4.0)
-      rspec-mocks (~> 3.4.0)
-    rspec-core (3.4.1)
-      rspec-support (~> 3.4.0)
-    rspec-expectations (3.4.0)
+    nanaimo (0.2.3)
+    rspec (3.7.0)
+      rspec-core (~> 3.7.0)
+      rspec-expectations (~> 3.7.0)
+      rspec-mocks (~> 3.7.0)
+    rspec-core (3.7.0)
+      rspec-support (~> 3.7.0)
+    rspec-expectations (3.7.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.4.0)
-    rspec-mocks (3.4.0)
+      rspec-support (~> 3.7.0)
+    rspec-mocks (3.7.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.4.0)
-    rspec-support (3.4.1)
-    thread_safe (0.3.5)
-    tzinfo (1.2.2)
-      thread_safe (~> 0.1)
-    xcodeproj (1.1.0)
-      activesupport (>= 3)
-      claide (>= 1.0.0, < 2.0)
-      colored (~> 1.2)
+      rspec-support (~> 3.7.0)
+    rspec-support (3.7.0)
+    xcodeproj (1.5.3)
+      CFPropertyList (~> 2.3.3)
+      claide (>= 1.0.2, < 2.0)
+      colored2 (~> 3.1)
+      nanaimo (~> 0.2.3)
 
 PLATFORMS
   ruby
@@ -44,4 +35,4 @@ DEPENDENCIES
   xcodeproj (~> 1.0)
 
 BUNDLED WITH
-   1.11.2
+   1.16.0