Support ESLint 8.x (#302)

Update packages to support eslint 8 and fix unsupported code error that results in 'Module specifier must be a string literal' parse error.
Update @typescript-eslint/experimental-utils, to be in line with eslint 8.x types.
Update typescript to 4.4.4, after updating of @typescript-eslint/experimental-utils, because it kept failing due to errors in 'node_modules/@typescript-eslint/types/dist/ast-spec.d.ts' and node_modules/typescript/lib/typescript.d.ts.
Remove typings/eslint.d.ts in favor of @types/eslint.
Remove all categories, since that's removed in eslint 8.
Fix spacing after/before imports, to fix failing eslint rule.
Replace 'message' with 'messageId', since 'message' has been removed.

Co-authored-by: Gijs Boer <g.boer@forion.nl>
Co-authored-by: vilchik-elena <elena.vilchik@sonarsource.com>

.cirrus.yml

@@ -23,7 +23,6 @@ build_task:
   <<: *ONLY_SONARSOURCE_QA
   gke_container:
     matrix:
-      - dockerfile: .cirrus/nodejs-10.Dockerfile
       - dockerfile: .cirrus/nodejs-12.Dockerfile
       - dockerfile: .cirrus/nodejs-14.Dockerfile
       - dockerfile: .cirrus/nodejs-15.Dockerfile

.cirrus/nodejs-12.Dockerfile

@@ -17,3 +17,4 @@ RUN curl "https://binaries.sonarsource.com/Distribution/sonar-scanner-cli/sonar-
 USER sonarsource
 
 ENV PATH "/opt/sonar-scanner/bin:${PATH}"
+ENV SONARCLOUD_ANALYSIS true

README.md

@@ -81,8 +81,8 @@ Code Smells, or maintainability issues, are raised for places of code which migh
 
 ## Prerequisites
 
-* Node.js (>=10.x).
-* ESLint 5.x, 6.x or 7.x (peer dependency for the plugin).
+* Node.js (>=12.x).
+* ESLint 5.x, 6.x, 7.x or 8.x (peer dependency for the plugin).
 
 ## Usage