Fix a few lints

lib/util/lemmatizer/rules.dart

@@ -1,7 +1,7 @@
 import 'package:jadb/util/lemmatizer/lemmatizer.dart';
-import 'package:jadb/util/lemmatizer/rules/godan-verbs.dart';
-import 'package:jadb/util/lemmatizer/rules/i-adjectives.dart';
-import 'package:jadb/util/lemmatizer/rules/ichidan-verbs.dart';
+import 'package:jadb/util/lemmatizer/rules/godan_verbs.dart';
+import 'package:jadb/util/lemmatizer/rules/i_adjectives.dart';
+import 'package:jadb/util/lemmatizer/rules/ichidan_verbs.dart';
 
 List<LemmatizationRule> lemmatizationRules = [
   ...ichidanVerbLemmatizationRules,

lib/util/romaji_transliteration.dart

@@ -1,9 +1,9 @@
 // Source: https://github.com/Kimtaro/ve/blob/master/lib/providers/japanese_transliterators.rb
 
-const hiragana_syllabic_n = 'ん';
-const hiragana_small_tsu = 'っ';
+const hiraganaSyllabicN = 'ん';
+const hiraganaSmallTsu = 'っ';
 
-const Map<String, String> hiragana_to_latin = {
+const Map<String, String> hiraganaToLatin = {
   'あ': 'a',
   'い': 'i',
   'う': 'u',
@@ -209,7 +209,7 @@ const Map<String, String> hiragana_to_latin = {
   'ゟ': 'yori',
 };
 
-const Map<String, String> latin_to_hiragana = {
+const Map<String, String> latinToHiragana = {
   'a': 'あ',
   'i': 'い',
   'u': 'う',
@@ -481,9 +481,9 @@ const Map<String, String> latin_to_hiragana = {
   '#~': '〜',
 };
 
-bool _smallTsu(String forConversion) => forConversion == hiragana_small_tsu;
+bool _smallTsu(String forConversion) => forConversion == hiraganaSmallTsu;
 bool _nFollowedByYuYeYo(String forConversion, String kana) =>
-    forConversion == hiragana_syllabic_n &&
+    forConversion == hiraganaSyllabicN &&
     kana.length > 1 &&
     'やゆよ'.contains(kana.substring(1, 2));
 
@@ -505,7 +505,7 @@ String transliterateHiraganaToLatin(String hiragana) {
       } else if (_nFollowedByYuYeYo(forConversion, kana)) {
         mora = "n'";
       }
-      mora ??= hiragana_to_latin[forConversion];
+      mora ??= hiraganaToLatin[forConversion];
 
       if (mora != null) {
         if (geminate) {
@@ -527,7 +527,7 @@ String transliterateHiraganaToLatin(String hiragana) {
 bool _doubleNFollowedByAIUEO(String forConversion) =>
     RegExp(r'^nn[aiueo]$').hasMatch(forConversion);
 bool _hasTableMatch(String forConversion) =>
-    latin_to_hiragana[forConversion] != null;
+    latinToHiragana[forConversion] != null;
 bool _hasDoubleConsonant(String forConversion, int length) =>
     forConversion == 'tch' ||
     (length == 2 &&
@@ -549,12 +549,12 @@ String transliterateLatinToHiragana(String latin) {
       final String forConversion = romaji.substring(0, length);
 
       if (_doubleNFollowedByAIUEO(forConversion)) {
-        mora = hiragana_syllabic_n;
+        mora = hiraganaSyllabicN;
         forRemoval = 1;
       } else if (_hasTableMatch(forConversion)) {
-        mora = latin_to_hiragana[forConversion];
+        mora = latinToHiragana[forConversion];
       } else if (_hasDoubleConsonant(forConversion, length)) {
-        mora = hiragana_small_tsu;
+        mora = hiraganaSmallTsu;
         forRemoval = 1;
       }