targetSdkVersion升级30 bug， Expected Android API level 21+ but was 30

[hujuny]

Caused by: java.lang.IllegalStateException: Expected Android API level 21+ but was 30 at okhttp3.internal.platform.AndroidPlatform.buildIfSupported(AndroidPlatform.java:238) at okhttp3.internal.platform.Platform.findPlatform(Platform.java:202) at okhttp3.internal.platform.Platform.<clinit>(Platform.java:79) at okhttp3.internal.platform.Platform.get(Platform.java:85)  at okhttp3.OkHttpClient.newSslSocketFactory(OkHttpClient.java:263)  at okhttp3.OkHttpClient.<init>(OkHttpClient.java:229)  at okhttp3.OkHttpClient$Builder.build(OkHttpClient.java:1015)  at com.zhouyou.http.EasyHttp.getOkHttpClient(EasyHttp.java:150)  at com.zhouyou.http.request.BaseRequest.generateOkClient(BaseRequest.java:400)  at com.zhouyou.http.request.BaseRequest.build(BaseRequest.java:535)  at com.zhouyou.http.request.PostRequest.execute(PostRequest.java:83)  at com.zhouyou.http.request.PostRequest.execute(PostRequest.java:78)