Update dependency pgtk to v0.18.1

Author: renovate[bot]

Gemfile.lock

@@ -54,9 +54,9 @@ GEM
     differ (0.1.2)
     docile (1.4.1)
     drb (2.2.3)
-    elapsed (0.0.1)
-      loog (> 0)
-      tago (> 0)
+    elapsed (0.2.0)
+      loog (~> 0.6)
+      tago (~> 0.1)
     erb (5.0.1)
     erubi (1.13.1)
     faraday (1.10.4)
@@ -105,7 +105,7 @@ GEM
       rdoc (>= 4.0.0)
       reline (>= 0.4.2)
     iri (0.11.2)
-    joined (0.3.0)
+    joined (0.4.0)
     json (2.13.2)
     language_server-protocol (3.17.0.5)
     lint_roller (1.1.0)
@@ -141,8 +141,11 @@ GEM
     parser (3.3.9.0)
       ast (~> 2.4.1)
       racc
-    pg (1.5.9)
-    pgtk (0.17.3)
+    pg (1.6.1-arm64-darwin)
+    pg (1.6.1-x64-mingw-ucrt)
+    pg (1.6.1-x86_64-darwin)
+    pg (1.6.1-x86_64-linux)
+    pgtk (0.18.1)
       backtrace (~> 0.4)
       concurrent-ruby (~> 1.3)
       joined (~> 0.3)