* Add support for WeChat Mini Program mode

* Bump version to 1.0.20

pom.xml

@@ -7,7 +7,7 @@
  <name>Connect2pay Java Client</name>
  <groupId>com.payxpert</groupId>
  <artifactId>connect2pay-client</artifactId>
- <version>1.0.19</version>
+ <version>1.0.20</version>
  <packaging>jar</packaging>
  <description>This is the Java implementation of the PayXpert Connect2pay Payment Page API.</description>
  <url>https://www.payxpert.com/</url>
@@ -91,7 +91,7 @@
    <plugin>
     <groupId>org.apache.maven.plugins</groupId>
     <artifactId>maven-javadoc-plugin</artifactId>
-    <version>3.1.1</version>
+    <version>3.2.0</version>
     <executions>
      <execution>
       <id>attach-javadocs</id>
@@ -212,12 +212,12 @@
   <dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-core</artifactId>
-   <version>2.9.9</version>
+   <version>2.10.3</version>
   </dependency>
   <dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
-   <version>2.9.9.1</version>
+   <version>2.10.3</version>
   </dependency>
   <dependency>
    <groupId>net.sf.oval</groupId>

src/main/java/com/payxpert/connect2pay/client/requests/WeChatDirectProcessRequest.java

@@ -1,6 +1,7 @@
 package com.payxpert.connect2pay.client.requests;
 
 import com.fasterxml.jackson.annotation.JsonIgnore;
+import com.fasterxml.jackson.annotation.JsonProperty;
 import com.payxpert.connect2pay.constants.WeChatPaymentMode;
 
 import net.sf.oval.constraint.CheckWith;
@@ -30,6 +31,10 @@ public class WeChatDirectProcessRequest extends GenericRequest<WeChatDirectProce
   @MaxLength(64)
   private String notificationTimeZone;
 
+  @JsonProperty("openID")
+  @MaxLength(64)
+  private String openId;
+
   public String getCustomerToken() {
     return customerToken;
   }
@@ -75,6 +80,15 @@ public WeChatDirectProcessRequest setNotificationTimeZone(String notificationTim
     return getThis();
   }
 
+  public String getOpenId() {
+    return openId;
+  }
+
+  public WeChatDirectProcessRequest setOpenId(String openId) {
+    this.openId = openId;
+    return getThis();
+  }
+
   @Override
   protected WeChatDirectProcessRequest getThis() {
     return this;

src/main/java/com/payxpert/connect2pay/client/response/WeChatDirectProcessResponse.java

@@ -38,6 +38,10 @@ public class WeChatDirectProcessResponse extends GenericResponse<WeChatDirectPro
   private String timestamp;
   private String sign;
 
+  // Mini Program specific parameters
+  private String paySign;
+  private String signType;
+
   /**
    * @return the result code
    */
@@ -216,4 +220,25 @@ public void setSign(String sign) {
     this.sign = sign;
   }
 
+  /**
+   * @return The signature to be used with mini program mode
+   */
+  public String getPaySign() {
+    return paySign;
+  }
+
+  public void setPaySign(String paySign) {
+    this.paySign = paySign;
+  }
+
+  /**
+   * @return The signature type used with mini program mode
+   */
+  public String getSignType() {
+    return signType;
+  }
+
+  public void setSignType(String signType) {
+    this.signType = signType;
+  }
 }

src/main/java/com/payxpert/connect2pay/constants/WeChatPaymentMode.java

@@ -20,7 +20,12 @@ public enum WeChatPaymentMode {
   /**
    * SDK mode: to be used for in-app mode
    */
-  SDK;
+  SDK,
+
+  /**
+   * MiniProgram mode: used when the payment must be performed from WeChat Mini Program
+   */
+  MINIPROGRAM;
 
   @JsonValue
   public String getFormattedName() {