Add English to Katakana and Romaji conversion support

types/kuroshiro.d.ts

@@ -0,0 +1,25 @@
+declare module "kuroshiro" {
+  interface ConvertOptions {
+    to?: "hiragana" | "katakana" | "romaji";
+    mode?: "normal" | "spaced" | "okurigana" | "furigana";
+    romajiSystem?: "nippon" | "passport" | "hepburn";
+    delimiter_start?: string;
+    delimiter_end?: string;
+  }
+
+  class Kuroshiro {
+    constructor();
+    init(analyzer: any): Promise<void>;
+    convert(text: string, options?: ConvertOptions): Promise<string>;
+  }
+
+  export = Kuroshiro;
+}
+
+declare module "kuroshiro-analyzer-mecab" {
+  class KuroshiroAnalyzerMecab {
+    constructor();
+  }
+
+  export = KuroshiroAnalyzerMecab;
+}