Update solargraph to version 0.38.6

Gemfile.lock

@@ -117,7 +117,7 @@ GEM
       mini_portile2 (~> 2.4.0)
     open_uri_redirections (0.2.1)
     parallel (1.19.1)
-    parser (2.7.0.2)
+    parser (2.7.1.0)
       ast (~> 2.4.0)
     pkg-config (1.3.2)
     prometheus_exporter (0.4.17)
@@ -166,13 +166,15 @@ GEM
     regexp_parser (1.6.0)
     reverse_markdown (1.4.0)
       nokogiri
-    rubocop (0.79.0)
+    rexml (3.2.4)
+    rubocop (0.81.0)
       jaro_winkler (~> 1.5.1)
       parallel (~> 1.10)
       parser (>= 2.7.0.1)
       rainbow (>= 2.2.2, < 4.0)
+      rexml
       ruby-progressbar (~> 1.7)
-      unicode-display_width (>= 1.4.0, < 1.7)
+      unicode-display_width (>= 1.4.0, < 2.0)
     rubocop-performance (1.5.2)
       rubocop (>= 0.71.0)
     ruby-progressbar (1.10.1)
@@ -192,7 +194,7 @@ GEM
     selenium-webdriver (3.142.7)
       childprocess (>= 0.5, < 4.0)
       rubyzip (>= 1.2.2)
-    solargraph (0.38.5)
+    solargraph (0.38.6)
       backport (~> 1.1)
       benchmark
       bundler (>= 1.17.2)
@@ -221,7 +223,7 @@ GEM
       thread_safe (~> 0.1)
     uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)
-    unicode-display_width (1.6.1)
+    unicode-display_width (1.7.0)
     vcr (5.1.0)
     web-console (3.7.0)
       actionview (>= 5.0)