ci(node): Resolve browserslist to 4.25.4

Also, commit a `package-lock.json` (version 1, so we can use it with npm 6), so that we pin our dependencies in CI.

See browserslist/browserslist#905 (comment)

Author: szokeasaurusrex

.github/workflows/test_node.yml

@@ -46,7 +46,7 @@ jobs:
       # We need to skip the fallback download because downloading will fail on release branches because the new version isn't available yet.
       # We have to use npm here because yarn fails on the non-existing existing optionalDependency version:
       # https://github.com/yarnpkg/berry/issues/2425#issuecomment-1627807326
-      - run: SENTRYCLI_SKIP_DOWNLOAD=1 npm install
+      - run: SENTRYCLI_SKIP_DOWNLOAD=1 npm ci
 
       # older node versions need an older nft
       - run: SENTRYCLI_SKIP_DOWNLOAD=1 npm install @vercel/nft@0.22.1

.npmrc

@@ -0,0 +1,2 @@
+# Compatibility with npm 6
+lockfile-version=1