Update README.md

Author: nstdio

README.md

@@ -4,12 +4,13 @@ The project provides useful extensions to
 JDK's [HttpClient](https://docs.oracle.com/en/java/javase/11/docs/api/java.net.http/java/net/http/HttpClient.html).
 
 ### Status
-| Type          | Status                                                                                                                                                                                                            |
-|---------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
-| Build         | [![Build](https://github.com/nstdio/http-client-ext/actions/workflows/build.yaml/badge.svg)](https://github.com/nstdio/http-client-ext/actions/workflows/build.yaml)                                              |
-| Artifact      | [![Maven Central](https://img.shields.io/maven-central/v/io.github.nstdio/http-client-ext.svg?label=Maven%20Central)](https://search.maven.org/search?q=g:%22io.github.nstdio%22%20AND%20a:%22http-client-ext%22) |
-| Javadoc       | [![javadoc](https://javadoc.io/badge2/io.github.nstdio/http-client-ext/javadoc.svg)](https://javadoc.io/doc/io.github.nstdio/http-client-ext)                                                                     |
-| Code coverage | [![codecov](https://codecov.io/gh/nstdio/http-client-ext/branch/main/graph/badge.svg)](https://codecov.io/gh/nstdio/http-client-ext)                                                                              |
+| Type          | Status                                                                                                                                                                                                                                                                                                                                                       |
+|---------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| Build         | [![Build](https://github.com/nstdio/http-client-ext/actions/workflows/build.yaml/badge.svg)](https://github.com/nstdio/http-client-ext/actions/workflows/build.yaml)                                                                                                                                                                                         |
+| Artifact      | [![Maven Central](https://img.shields.io/maven-central/v/io.github.nstdio/http-client-ext.svg?label=Maven%20Central)](https://search.maven.org/search?q=g:%22io.github.nstdio%22%20AND%20a:%22http-client-ext%22)                                                                                                                                            |
+| Javadoc       | [![javadoc](https://javadoc.io/badge2/io.github.nstdio/http-client-ext/javadoc.svg)](https://javadoc.io/doc/io.github.nstdio/http-client-ext)                                                                                                                                                                                                                |
+| Code coverage | [![codecov](https://codecov.io/gh/nstdio/http-client-ext/branch/main/graph/badge.svg)](https://codecov.io/gh/nstdio/http-client-ext)                                                                                                                                                                                                                         |
+| LGTM          | [![Total alerts](https://img.shields.io/lgtm/alerts/g/nstdio/http-client-ext.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/nstdio/http-client-ext/alerts/) [![Language grade: Java](https://img.shields.io/lgtm/grade/java/g/nstdio/http-client-ext.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/nstdio/http-client-ext/context:java) |
 
 ### Gradle