fix: Using covariant interface for IParser and IParseResult.

Rename CanonSharp.Common to CanonSharp.Pascal.

CanonSharp.Tests/TextTests/TextParserTests.cs

@@ -1,7 +1,7 @@
 using CanonSharp.Combinator.Abstractions;
 using CanonSharp.Combinator.Extensions;
 using CanonSharp.Combinator.Text;
-using CanonSharp.Common.Scanner;
+using CanonSharp.Pascal.Scanner;
 using CanonSharp.Tests.Utils;
 using static CanonSharp.Combinator.Text.TextParserBuilder;
 
@@ -24,7 +24,7 @@ public class TextParserTests : ParserTestsBase
     [InlineData('d', "d")]
     public void OneOfTest(char except, string input)
     {
-        Parser<char, char> parser = OneOf("abcd");
+        IParser<char, char> parser = OneOf("abcd");
         ValidateSuccessfulResult(parser, except, input);
     }
 
@@ -39,7 +39,7 @@ public class TextParserTests : ParserTestsBase
     [InlineData('D', "D")]
     public void OneOfIgnoreCaseTest(char except, string input)
     {
-        Parser<char, char> parser = OneOfIgnoreCase("abcd");
+        IParser<char, char> parser = OneOfIgnoreCase("abcd");
         ValidateSuccessfulResult(parser, except, input);
     }
 
@@ -50,7 +50,7 @@ public class TextParserTests : ParserTestsBase
     [InlineData("Hello,World.")]
     public void StringIgnoreCaseTest(string literalValue)
     {
-        Parser<char, string> parser = StringIgnoreCase("hello,world.");
+        IParser<char, string> parser = StringIgnoreCase("hello,world.");
         ValidateSuccessfulResult(parser, literalValue, literalValue);
     }
 
@@ -60,7 +60,7 @@ public class TextParserTests : ParserTestsBase
     [InlineData('9')]
     public void RangeTest(char except)
     {
-        Parser<char, char> parser = Range('0', '9');
+        IParser<char, char> parser = Range('0', '9');
         ValidateSuccessfulResult(parser, except, except.ToString());
 
         ValidateFailedResult(parser, "abc");
@@ -161,8 +161,8 @@ public class TextParserTests : ParserTestsBase
                                     test
                                     """);
 
-        Parser<char, IEnumerable<string>> parser = StringIgnoreCase("test").SkipSpaceAndLineBreak().Many();
-        ParseResult<char, IEnumerable<string>> result = parser.Parse(state);
+        IParser<char, IEnumerable<string>> parser = StringIgnoreCase("test").SkipSpaceAndLineBreak().Many();
+        IParseResult<char, IEnumerable<string>> result = parser.Parse(state);
 
         Assert.All(result.Value, x => Assert.Equal("test", x.ToLower()));
     }