Fix resolve install in old npm version on CI.

tests/dep-time-travel.sh

@@ -43,6 +43,14 @@ if [[ "$TRAVIS_NODE_VERSION" -lt "8" ]]; then
   npm i --no-save eslint-import-resolver-typescript@1.0.2
 fi
 
+# linklocal (pretest) symlinks the local resolver source, but old npm doesn't install its nested deps
+if [[ "$TRAVIS_NODE_VERSION" -lt "10" ]]; then
+  for dir in resolvers/*/; do
+    echo "Installing dependencies for ${dir}..."
+    (cd "$dir" && npm install)
+  done
+fi
+
 if [ "${ESLINT_VERSION}" = '8' ]; then
   # This is a workaround for the crash in the initial processing of the ESLint class.
   echo "Installing self"

tests/src/core/importType.js

@@ -82,6 +82,7 @@ describe('importType(name)', function () {
   });
 
   it("should return 'internal' for aliased internal modules that look like core modules (webpack resolver)", function () {
+    this.timeout(10000); // initial load of the webpack resolver is slow on old Node + macOS CI
     const webpackConfig = { resolve: { modules: [pathToTestFiles, 'node_modules'] } };
     const pathContext = testContext({ 'import/resolver': { webpack: { config: webpackConfig } } });
     expect(importType('constants/index', pathContext)).to.equal('internal');