should follow Java Escape Character rule to allow \n or \t in env

modules/core/src/main/java/net/ashald/envfile/providers/dotenv/DotEnvFileParser.java

@@ -2,6 +2,7 @@
 
 import net.ashald.envfile.AbstractEnvVarsProvider;
 import net.ashald.envfile.EnvFileErrorException;
+import org.apache.commons.text.StringEscapeUtils;
 import org.jetbrains.annotations.NotNull;
 
 import java.io.IOException;
@@ -43,7 +44,7 @@ protected Map<String, String> getEnvVars(@NotNull Map<String, String> runConfigE
     }
 
     private static String trim(String value) {
-        String trimmed = value.trim();
+        String trimmed = StringEscapeUtils.unescapeJava(value.trim()) ;
 
         if ((trimmed.startsWith("\"") && trimmed.endsWith("\"")) || (trimmed.startsWith("'") && trimmed.endsWith("'")))
             return trimmed.substring(1, trimmed.length() - 1);

modules/core/src/test/java/net/ashald/envfile/providers/dotenv/DotEnvFileParserTest.java

@@ -67,4 +67,11 @@ public void testOrder() throws EnvFileErrorException, IOException {
         Assert.assertEquals("A(B(C))", result.get("A"));
     }
 
+    @Test
+    public void testMultiLine() throws EnvFileErrorException {
+        Map<String, String> result = parser.getEnvVars(Collections.emptyMap(), getFile("multiline.env"));
+        Assert.assertEquals(1, result.size());
+        Assert.assertEquals("this\nis\nmultiline", result.get("A"));
+    }
+
 }

modules/core/src/test/resources/providers/dotenv/backslashes.env

@@ -1 +1 @@
-TEST_VAR=value\1
+TEST_VAR=value\\1

modules/core/src/test/resources/providers/dotenv/inline-comments.env

@@ -2,4 +2,4 @@ key1=foo#bar
 key2=foo #bar
 key3='foo #bar'
 key4="foo #bar"
-key5=foo \#bar
+key5=foo \\#bar

modules/core/src/test/resources/providers/dotenv/malformed-unicode.env

@@ -1 +1 @@
-FOO=\usr
+FOO=\\usr

modules/core/src/test/resources/providers/dotenv/multiline.env

@@ -0,0 +1 @@
+A="this\nis\nmultiline"