#734 -> update maven coordinates

alibaba-spring-cloud-docs/src/main/asciidoc/dependency-management.adoc

@@ -0,0 +1,38 @@
+== Dependency Management
+
+### Spring Cloud Alibaba Bill of Materials (BOM)
+
+If you’re a Maven Central user, add our BOM to your pom.xml <dependencyManagement> section. This will allow you to omit versions for any of the Maven dependencies and instead delegate versioning to the BOM.
+
+```xml
+<dependencyManagement>
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-alibaba-dependencies</artifactId>
+            <version>2.1.0.RELEASE</version>
+            <type>pom</type>
+            <scope>import</scope>
+        </dependency>
+    </dependencies>
+</dependencyManagement>
+```
+
+### Spring Snapshots Maven Repository
+
+If you want to use the latest BUILD-SNAPSHOT version, add Spring Snapshot Repository in pom.xml , Attention: BUILD-SNAPSHOT may be updated in any time:
+
+```xml
+<repositories>
+    <repository>
+        <id>spring-snapshots</id>
+        <name>Spring SnapShots</name>
+        <url>https://repo.spring.io/libs-snapshot</url>
+        <snapshots>
+            <enabled>true</enabled>
+        </snapshots>
+    </repository>
+</repositories>
+```
+
+For example, the 0.2.0.BUILD-SNAPSHOT is available from this repository.