fix(config): Update path handling logic to work on Windows (#262)

* fix(config): Update path handling logic to work on Windows

* chore(doc): Expand the comment on the new path handling

lib/postgrator-cli.js

@@ -23,9 +23,16 @@ function getMigrateToNumber(toArgument) {
 }
 
 function getAbsolutePath(fileOrDirectory) {
-    return (path.isAbsolute(fileOrDirectory))
+    const absPath = (path.isAbsolute(fileOrDirectory))
         ? fileOrDirectory
         : path.join(process.cwd(), fileOrDirectory);
+
+    // Paths must use posix forward slashes to work properly ever since
+    // postgrator updated to the newer version of glob
+    //
+    // https://github.com/rickbergfalk/postgrator/blob/master/CHANGELOG.md#800
+    // https://github.com/isaacs/node-glob/blob/main/changelog.md#81
+    return absPath.replaceAll(path.sep, path.posix.sep);
 }
 
 const loadYaml = (_, content) => yaml.parse(content);