move version class to drongo

src/main/java/com/sparrowwallet/drongo/Version.java

@@ -0,0 +1,54 @@
+package com.sparrowwallet.drongo;
+
+public class Version implements Comparable<Version> {
+    private final String version;
+
+    public final String get() {
+        return this.version;
+    }
+
+    public Version(String version) {
+        if(version == null) {
+            throw new IllegalArgumentException("Version can not be null");
+        }
+        if(!version.matches("[0-9]+(\\.[0-9]+)*")) {
+            throw new IllegalArgumentException("Invalid version format");
+        }
+        this.version = version;
+    }
+
+    @Override
+    public int compareTo(Version that) {
+        if(that == null) {
+            return 1;
+        }
+        String[] thisParts = this.get().split("\\.");
+        String[] thatParts = that.get().split("\\.");
+        int length = Math.max(thisParts.length, thatParts.length);
+        for(int i = 0; i < length; i++) {
+            int thisPart = i < thisParts.length ? Integer.parseInt(thisParts[i]) : 0;
+            int thatPart = i < thatParts.length ? Integer.parseInt(thatParts[i]) : 0;
+            if(thisPart < thatPart) {
+                return -1;
+            }
+            if(thisPart > thatPart) {
+                return 1;
+            }
+        }
+        return 0;
+    }
+
+    @Override
+    public boolean equals(Object that) {
+        if(this == that) {
+            return true;
+        }
+        if(that == null) {
+            return false;
+        }
+        if(this.getClass() != that.getClass()) {
+            return false;
+        }
+        return this.compareTo((Version) that) == 0;
+    }
+}