Set allowRelativePaths directly in files

Per member feedback, the allowing of relative paths
was not entirely intentional for rules using the
`ignore` library. This commit also reverts the
utility for creating `ignore` instances.

lib/rules/no-restricted-imports.js

@@ -8,7 +8,7 @@
 // Rule Definition
 //------------------------------------------------------------------------------
 
-const ignore = require("../shared/ignore");
+const ignore = require("ignore");
 
 const arrayOfStringsOrObjects = {
     type: "array",
@@ -145,12 +145,18 @@ module.exports = {
         }, {});
 
         // Handle patterns too, either as strings or groups
-        const restrictedPatterns = (isPathAndPatternsObject ? options[0].patterns : []) || [];
-        const restrictedPatternGroups = restrictedPatterns.length > 0 && typeof restrictedPatterns[0] === "string"
-            ? [{ matcher: ignore().add(restrictedPatterns) }]
-            : restrictedPatterns.map(({ group, message, caseSensitive }) => ({
-                matcher: ignore({ ignorecase: !caseSensitive }).add(group), customMessage: message
-            }));
+        let restrictedPatterns = (isPathAndPatternsObject ? options[0].patterns : []) || [];
+
+        // standardize to array of objects if we have an array of strings
+        if (restrictedPatterns.length > 0 && typeof restrictedPatterns[0] === "string") {
+            restrictedPatterns = [{ group: restrictedPatterns }];
+        }
+
+        // relative paths are supported for this rule
+        const restrictedPatternGroups = restrictedPatterns.map(({ group, message, caseSensitive }) => ({
+            matcher: ignore({ allowRelativePaths: true, ignorecase: !caseSensitive }).add(group),
+            customMessage: message
+        }));
 
         // if no imports are restricted we don't need to check
         if (Object.keys(restrictedPaths).length === 0 && restrictedPatternGroups.length === 0) {

lib/rules/no-restricted-modules.js

@@ -9,7 +9,7 @@
 // Rule Definition
 //------------------------------------------------------------------------------
 
-const ignore = require("../shared/ignore");
+const ignore = require("ignore");
 
 const arrayOfStrings = {
     type: "array",
@@ -103,7 +103,8 @@ module.exports = {
             return {};
         }
 
-        const ig = ignore().add(restrictedPatterns);
+        // relative paths are supported for this rule
+        const ig = ignore({ allowRelativePaths: true }).add(restrictedPatterns);
 
 
         /**