Use standard RFC4648 base64 when encoding session cookie

Closes #60

src/main/java/com/vtence/molecule/session/DigestAlgorithm.java → src/main/java/com/vtence/molecule/crypto/DigestAlgorithm.java

@@ -1,4 +1,4 @@
-package com.vtence.molecule.session;
+package com.vtence.molecule.crypto;
 
 public interface DigestAlgorithm {
 

src/main/java/com/vtence/molecule/session/HMacDigest.java → src/main/java/com/vtence/molecule/crypto/HMacDigest.java

@@ -1,4 +1,4 @@
-package com.vtence.molecule.session;
+package com.vtence.molecule.crypto;
 
 import javax.crypto.Mac;
 import javax.crypto.spec.SecretKeySpec;

src/main/java/com/vtence/molecule/session/SecureSessionEncoder.java

@@ -1,16 +1,17 @@
 package com.vtence.molecule.session;
 
+import com.vtence.molecule.crypto.DigestAlgorithm;
+import com.vtence.molecule.crypto.HMacDigest;
+
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Base64;
 import java.util.List;
 
 public class SecureSessionEncoder implements SessionEncoder {
 
-    private static final byte[] NO_LINE_BREAK = new byte[0];
-
-    private final Base64.Encoder encoder = Base64.getMimeEncoder(0, NO_LINE_BREAK);
-    private final Base64.Decoder decoder = Base64.getMimeDecoder();
+    private final Base64.Encoder encoder = Base64.getEncoder();
+    private final Base64.Decoder decoder = Base64.getDecoder();
 
     private final List<String> keys = new ArrayList<>();
     private final Marshaller<Session> marshaller;

src/test/java/com/vtence/molecule/session/HMacDigestTest.java → src/test/java/com/vtence/molecule/crypto/HMacDigestTest.java

@@ -1,4 +1,4 @@
-package com.vtence.molecule.session;
+package com.vtence.molecule.crypto;
 
 import org.junit.Test;