Update solargraph to version 0.39.17

Gemfile.lock

@@ -121,8 +121,8 @@ GEM
     nokogiri (1.10.10)
       mini_portile2 (~> 2.4.0)
     open_uri_redirections (0.2.1)
-    parallel (1.19.2)
-    parser (2.7.1.4)
+    parallel (1.20.1)
+    parser (2.7.2.0)
       ast (~> 2.4.1)
     pkg-config (1.3.2)
     prometheus_exporter (0.6.0)
@@ -165,21 +165,21 @@ GEM
     rainbow (3.0.0)
     rake (13.0.1)
     redcarpet (3.4.0)
-    regexp_parser (1.7.1)
+    regexp_parser (1.8.2)
     reverse_markdown (2.0.0)
       nokogiri
     rexml (3.2.4)
-    rubocop (0.88.0)
+    rubocop (0.93.1)
       parallel (~> 1.10)
-      parser (>= 2.7.1.1)
+      parser (>= 2.7.1.5)
       rainbow (>= 2.2.2, < 4.0)
-      regexp_parser (>= 1.7)
+      regexp_parser (>= 1.8)
       rexml
-      rubocop-ast (>= 0.1.0, < 1.0)
+      rubocop-ast (>= 0.6.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 1.4.0, < 2.0)
-    rubocop-ast (0.3.0)
-      parser (>= 2.7.1.4)
+    rubocop-ast (1.3.0)
+      parser (>= 2.7.1.5)
     rubocop-performance (1.6.1)
       rubocop (>= 0.71.0)
     ruby-progressbar (1.10.1)
@@ -196,7 +196,7 @@ GEM
     selenium-webdriver (3.142.7)
       childprocess (>= 0.5, < 4.0)
       rubyzip (>= 1.2.2)
-    solargraph (0.39.8)
+    solargraph (0.39.17)
       backport (~> 1.1)
       benchmark
       bundler (>= 1.17.2)