Bump development/test gems

- byebug
- dotenv-rails
- pry-byebug
- rspec-rails (dependencies)
- spring

Gemfile.lock

@@ -106,7 +106,7 @@ GEM
     brakeman (4.1.1)
     browser (2.3.0)
     builder (3.2.3)
-    byebug (9.0.6)
+    byebug (9.1.0)
     capybara (2.13.0)
       addressable
       mime-types (>= 1.16)
@@ -166,13 +166,13 @@ GEM
       railties (>= 4.1.0, < 5.2)
       responders
       warden (~> 1.2.3)
-    diff-lcs (1.2.5)
+    diff-lcs (1.3)
     domain_name (0.5.20170404)
       unf (>= 0.0.5, < 1.0.0)
-    dotenv (2.2.0)
-    dotenv-rails (2.2.0)
-      dotenv (= 2.2.0)
-      railties (>= 3.2, < 5.1)
+    dotenv (2.2.1)
+    dotenv-rails (2.2.1)
+      dotenv (= 2.2.1)
+      railties (>= 3.2, < 5.2)
     draper (3.0.0.pre1)
       actionpack (~> 5.0)
       activemodel (~> 5.0)
@@ -491,8 +491,8 @@ GEM
     pry (0.11.3)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    pry-byebug (3.4.2)
-      byebug (~> 9.0)
+    pry-byebug (3.5.1)
+      byebug (~> 9.1)
       pry (~> 0.10)
     public_suffix (3.0.1)
     rack (2.0.3)
@@ -655,7 +655,7 @@ GEM
     spreadsheet_architect (1.4.8)
       axlsx (>= 2.0)
       rodf (= 0.3.7)
-    spring (2.0.1)
+    spring (2.0.2)
       activesupport (>= 4.2)
     spring-commands-rspec (1.0.4)
       spring (>= 0.9.1)