feat: u flag by default

src/regexp-string-matcher.ts

@@ -5,7 +5,7 @@ import escapeStringRegexp from "escape-string-regexp";
 import { isRegExpString, parseRegExpString } from "./regexp-parse";
 import toRegex from "to-regex";
 
-const DEFAULT_FLAGS = "g";
+const DEFAULT_FLAGS = "ug";
 
 const defaultFlags = (flagsString: string) => {
     if (flagsString.length === 0) {

test/snapshots/unicode-by-default-regexp/input-patterns.json

@@ -0,0 +1,3 @@
+[
+  "/\uD834\uDF06{3}/"
+]

test/snapshots/unicode-by-default-regexp/input.txt

@@ -0,0 +1 @@
+𝌆𝌆𝌆

test/snapshots/unicode-by-default-regexp/output-for-human.md

@@ -0,0 +1,11 @@
+
+- match text: **𝌆𝌆𝌆**
+- captures: **[]**
+- startIndex: **0**
+- endIndex: **6**
+
+```
+**𝌆𝌆𝌆**
+
+```
+

test/snapshots/unicode-by-default-regexp/output-for-machine.json

@@ -0,0 +1,8 @@
+[
+    {
+        "match": "𝌆𝌆𝌆",
+        "captures": [],
+        "startIndex": 0,
+        "endIndex": 6
+    }
+]