Try to resolve from the context of the original request

When trying to prove the resolve works, it is good to do it from the
original context of the file which is how webpack will try to resolve
it.

src/index.ts

@@ -46,7 +46,7 @@ export const rewriteCoreJsRequest = (originalRequest: string, lowerVersion = fal
  const [,matchedVersion, matchedPath] = originalRequest.match(/core-js\/es(5|6|7)(.*)?/);
 
  const version = matchedVersion;
- 
+
  if (version === '5') {
  return null;
  }
@@ -85,7 +85,7 @@ export default function CoreJSUpgradeWebpackPlugin(options: Options) {
  options = Object.assign({}, defaultOptions, options || {});
 
  const resolvers = options.resolveFrom ? [].concat(options.resolveFrom).map(r => resolveFrom.bind(null, r)) : [];
- 
+
  return new NormalModuleReplacementPlugin(/core-js/, resource => {
  const originalRequest = (resource.userRequest || resource.request) as string;
  if (originalRequest.startsWith('./') || originalRequest.startsWith('../')) {
@@ -96,7 +96,7 @@ export default function CoreJSUpgradeWebpackPlugin(options: Options) {
  }
 
  try {
- require.resolve(originalRequest);
+ require.resolve(originalRequest, { paths: [resource.context] });
  } catch (originalError) {
  let error = true;
 
@@ -109,7 +109,7 @@ export default function CoreJSUpgradeWebpackPlugin(options: Options) {
  error = false;
  } catch (e) {}
  }
- 
+
  // attempt to upgrade the path from core-js v2 to v3 from backup
  if (error) {
  try {
@@ -118,7 +118,7 @@ export default function CoreJSUpgradeWebpackPlugin(options: Options) {
  error = false;
  } catch (e) {}
  }
- 
+
  // attempt to downgrade the path from es7 to es6 from backup
  if (error) {
  try {