Update dependencies, and ruby version of CI

Author: kyontan

.travis.yml

@@ -1,7 +1,8 @@
 language: ruby
 rvm:
-  - 2.6.6
-  - 2.7.1
+  - 2.6.7
+  - 2.7.3
+  - 3.0.1
   - ruby-head
 script:
   - bundle exec rspec

Gemfile.lock

@@ -1,12 +1,12 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    coderay (1.1.2)
-    diff-lcs (1.3)
-    ffi (1.10.0)
+    coderay (1.1.3)
+    diff-lcs (1.4.4)
+    ffi (1.15.0)
     formatador (0.2.5)
     growl (1.0.3)
-    guard (2.15.0)
+    guard (2.16.2)
       formatador (>= 0.2.4)
       listen (>= 2.7, < 4.0)
       lumberjack (>= 1.0.12, < 2.0)
@@ -22,43 +22,41 @@ GEM
       rspec (>= 2.99.0, < 4.0)
     libnotify (0.9.4)
       ffi (>= 1.0.11)
-    listen (3.1.5)
-      rb-fsevent (~> 0.9, >= 0.9.4)
-      rb-inotify (~> 0.9, >= 0.9.7)
-      ruby_dep (~> 1.2)
-    lumberjack (1.0.13)
-    method_source (0.9.2)
+    listen (3.5.1)
+      rb-fsevent (~> 0.10, >= 0.10.3)
+      rb-inotify (~> 0.9, >= 0.9.10)
+    lumberjack (1.2.8)
+    method_source (1.0.0)
     nenv (0.3.0)
-    notiffany (0.1.1)
+    notiffany (0.1.3)
       nenv (~> 0.1)
       shellany (~> 0.0)
-    power_assert (1.1.4)
-    pry (0.12.2)
-      coderay (~> 1.1.0)
-      method_source (~> 0.9.0)
-    rb-fsevent (0.10.3)
-    rb-inotify (0.10.0)
+    power_assert (1.1.7)
+    pry (0.14.1)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    rb-fsevent (0.10.4)
+    rb-inotify (0.10.1)
       ffi (~> 1.0)
     rb-notifu (0.0.4)
-    rspec (3.8.0)
-      rspec-core (~> 3.8.0)
-      rspec-expectations (~> 3.8.0)
-      rspec-mocks (~> 3.8.0)
-    rspec-core (3.8.0)
-      rspec-support (~> 3.8.0)
-    rspec-expectations (3.8.2)
+    rspec (3.10.0)
+      rspec-core (~> 3.10.0)
+      rspec-expectations (~> 3.10.0)
+      rspec-mocks (~> 3.10.0)
+    rspec-core (3.10.1)
+      rspec-support (~> 3.10.0)
+    rspec-expectations (3.10.1)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.8.0)
-    rspec-mocks (3.8.0)
+      rspec-support (~> 3.10.0)
+    rspec-mocks (3.10.2)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.8.0)
+      rspec-support (~> 3.10.0)
     rspec-power_assert (1.1.0)
       power_assert (~> 1.1.0)
       rspec (>= 2.14)
-    rspec-support (3.8.0)
-    ruby_dep (1.5.0)
+    rspec-support (3.10.2)
     shellany (0.0.1)
-    thor (0.20.3)
+    thor (1.1.0)
 
 PLATFORMS
   ruby
@@ -72,4 +70,4 @@ DEPENDENCIES
   rspec-power_assert
 
 BUNDLED WITH
-   2.1.4
+   2.2.15