1 Warning in install.packages : cannot remove prior installation of package
因为可能打开了安装这个包相关的包，重启R，重新安装。
2 namespace ‘rlang’ 0.4.6 is already loaded, but >= 0.4.7 is required
先卸载掉旧的，再安装新的。
remove.packages("rlang")
install.packages("rlang")1 Warning in install.packages : cannot remove prior installation of package
因为可能打开了安装这个包相关的包，重启R，重新安装。
2 namespace ‘rlang’ 0.4.6 is already loaded, but >= 0.4.7 is required
先卸载掉旧的，再安装新的。
remove.packages("rlang")
install.packages("rlang")