fix: use http client version range

Author: eshanholtz

pom.xml

@@ -21,7 +21,6 @@
   </licenses>
   <properties>
     <jackson.version>2.10.2</jackson.version>
-    <java-http-client.version>4.3.0</java-http-client.version>
   </properties>
   <scm>
     <url>https://github.com/sendgrid/sendgrid-java</url>
@@ -267,7 +266,7 @@
     <dependency>
       <groupId>com.sendgrid</groupId>
       <artifactId>java-http-client</artifactId>
-      <version>${java-http-client.version}</version>
+      <version>[4.2,)</version>
     </dependency>
     <dependency>
       <groupId>com.fasterxml.jackson.core</groupId>