Update solargraph to version 0.39.11

Gemfile.lock

@@ -113,12 +113,12 @@ GEM
     multi_xml (0.6.0)
     multipart-post (2.1.1)
     nio4r (2.5.2)
-    nokogiri (1.10.9)
+    nokogiri (1.10.10)
       mini_portile2 (~> 2.4.0)
     open_uri_redirections (0.2.1)
     parallel (1.19.2)
-    parser (2.7.1.3)
-      ast (~> 2.4.0)
+    parser (2.7.1.4)
+      ast (~> 2.4.1)
     pkg-config (1.3.2)
     prometheus_exporter (0.5.1)
     public_suffix (4.0.5)
@@ -164,16 +164,16 @@ GEM
     reverse_markdown (2.0.0)
       nokogiri
     rexml (3.2.4)
-    rubocop (0.85.1)
+    rubocop (0.87.1)
       parallel (~> 1.10)
-      parser (>= 2.7.0.1)
+      parser (>= 2.7.1.1)
       rainbow (>= 2.2.2, < 4.0)
       regexp_parser (>= 1.7)
       rexml
-      rubocop-ast (>= 0.0.3)
+      rubocop-ast (>= 0.1.0, < 1.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 1.4.0, < 2.0)
-    rubocop-ast (0.0.3)
+    rubocop-ast (0.1.0)
       parser (>= 2.7.0.1)
     rubocop-performance (1.6.1)
       rubocop (>= 0.71.0)
@@ -191,7 +191,7 @@ GEM
     selenium-webdriver (3.142.7)
       childprocess (>= 0.5, < 4.0)
       rubyzip (>= 1.2.2)
-    solargraph (0.39.8)
+    solargraph (0.39.11)
       backport (~> 1.1)
       benchmark
       bundler (>= 1.17.2)