tools: improve update-eslint.sh

* Pin version numbers when using `npx`. This means we can be careful
  about updating what we run. (Thinking about the recent eslint-scope
  thing.)
* Add removeNPMAbsolutePaths to get rid of unused fields in package.json
  files. These unused fields can cause unnecessary churn, as at least
  one contains an absolute path that will be different for each
  developer.

PR-URL: #21819
Reviewed-By: Yuta Hiroto <[email protected]>
Reviewed-By: Vse Mozhet Byt <[email protected]>
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Richard Lau <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Trivikram Kamat <[email protected]>
Reviewed-By: Roman Reiss <[email protected]>

tools/update-eslint.sh

@@ -20,7 +20,10 @@ npm install --no-bin-links --production --no-package-lock eslint-plugin-markdown
 cd ../..
 
 # Use dmn to remove some unneeded files.
-npx dmn -f clean
+npx [email protected] -f clean
+# Use removeNPMAbsolutePaths to remove unused data in package.json.
+# This avoids churn as absolute paths can change from one dev to another.
+npx [email protected] .
 
 cd ..
 mv eslint-tmp/node_modules/eslint node_modules/eslint