update lock file

Gemfile.lock

@@ -12,17 +12,17 @@ GEM
     addressable (2.7.0)
       public_suffix (>= 2.0.2, < 5.0)
     colorator (1.1.0)
-    concurrent-ruby (1.1.5)
+    concurrent-ruby (1.1.6)
     em-websocket (0.5.1)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0.6.0)
     eventmachine (1.2.7)
     eventmachine (1.2.7-x64-mingw32)
-    ffi (1.11.2)
-    ffi (1.11.2-x64-mingw32)
+    ffi (1.12.2)
+    ffi (1.12.2-x64-mingw32)
     forwardable-extended (2.6.0)
     http_parser.rb (0.6.0)
-    i18n (1.7.0)
+    i18n (1.8.2)
       concurrent-ruby (~> 1.0)
     jekyll (4.0.0)
       addressable (~> 2.4)
@@ -43,11 +43,11 @@ GEM
       jekyll (>= 3.7, < 5.0)
     jekyll-paginate-v2 (3.0.0)
       jekyll (>= 3.0, < 5.0)
-    jekyll-sass-converter (2.0.1)
+    jekyll-sass-converter (2.1.0)
       sassc (> 2.0.1, < 3.0)
     jekyll-seo-tag (2.6.1)
       jekyll (>= 3.3, < 5.0)
-    jekyll-theme-lcsb-default (0.3.0)
+    jekyll-theme-lcsb-default (0.3.3)
       jekyll (~> 4.0)
       jekyll-seo-tag (~> 2.5)
     jekyll-watch (2.2.1)
@@ -56,7 +56,7 @@ GEM
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)
     liquid (4.0.3)
-    listen (3.2.0)
+    listen (3.2.1)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.3.6)
@@ -66,11 +66,11 @@ GEM
       jekyll-seo-tag (~> 2.1)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (4.0.1)
+    public_suffix (4.0.3)
     rb-fsevent (0.10.3)
-    rb-inotify (0.10.0)
+    rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rouge (3.13.0)
+    rouge (3.17.0)
     safe_yaml (1.0.5)
     sassc (2.2.1)
       ffi (~> 1.9)
@@ -78,11 +78,11 @@ GEM
       ffi (~> 1.9)
     terminal-table (1.8.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
-    tzinfo (2.0.0)
+    tzinfo (2.0.1)
       concurrent-ruby (~> 1.0)
     tzinfo-data (1.2019.3)
       tzinfo (>= 1.0.0)
-    unicode-display_width (1.6.0)
+    unicode-display_width (1.6.1)
 
 PLATFORMS
   ruby