fix : 去除对 spring-webmvc 的依赖

brave-spring-boot-starter/pom.xml

@@ -15,6 +15,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <brave.version>4.19.1</brave.version>
         <zipkin-reporter2.version>2.5.0</zipkin-reporter2.version>
+        <okhttp.version>3.10.0</okhttp.version>
     </properties>
 
     <dependencies>
@@ -28,11 +29,10 @@
             <artifactId>httpclient</artifactId>
             <optional>true</optional>
         </dependency>
-
         <dependency>
             <groupId>com.squareup.okhttp3</groupId>
             <artifactId>okhttp</artifactId>
-            <version>3.10.0</version>
+            <version>${okhttp.version}</version>
             <optional>true</optional>
         </dependency>