Bump guard from 2.19.0 to 2.19.1

Bumps [guard](https://github.com/guard/guard) from 2.19.0 to 2.19.1.
- [Release notes](https://github.com/guard/guard/releases)
- [Commits](guard/guard@v2.19.0...v2.19.1)

---
updated-dependencies:
- dependency-name: guard
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Gemfile.lock

@@ -43,14 +43,16 @@ GEM
     docile (1.4.1)
     drb (2.2.0)
       ruby2_keywords
-    ffi (1.17.0)
+    ffi (1.17.1)
     formatador (1.1.0)
-    guard (2.19.0)
+    guard (2.19.1)
       formatador (>= 0.2.4)
       listen (>= 2.7, < 4.0)
+      logger (~> 1.6)
       lumberjack (>= 1.0.12, < 2.0)
       nenv (~> 0.1)
       notiffany (~> 0.0)
+      ostruct (~> 0.6)
       pry (>= 0.13.0)
       shellany (~> 0.0)
       thor (>= 0.18.1)
@@ -65,6 +67,7 @@ GEM
     listen (3.9.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
+    logger (1.7.0)
     lumberjack (1.2.10)
     method_source (1.1.0)
     mini_portile2 (2.8.7)
@@ -77,6 +80,7 @@ GEM
     notiffany (0.1.3)
       nenv (~> 0.1)
       shellany (~> 0.0)
+    ostruct (0.6.1)
     parallel (1.21.0)
     parser (3.0.2.0)
       ast (~> 2.4.1)
@@ -94,7 +98,7 @@ GEM
       ttfunk (~> 1.7)
     prawn-table (0.2.2)
       prawn (>= 1.3.0, < 3.0.0)
-    pry (0.14.2)
+    pry (0.15.2)
       coderay (~> 1.1)
       method_source (~> 1.0)
     racc (1.8.1)