update cn functions

CEDA/__init__.py

@@ -1,5 +1,5 @@
 from CEDA.MacroEcon.cn import (
-    gdp_quarter,
+    gdp_quarterly,
     ppi_monthly,
     cpi_monthly,
     pmi_monthly,

README.md

@@ -12,4 +12,5 @@ This is a data collecting project, with both `python` and `R`
 
 * Thanks [akshare](https://github.com/jindaxiang/akshare/)
 * Thanks [EastMoney](https://www.eastmoney.com)
-* Thanks [St.Louis Fred Reserve Bank](https://fred.stlouisfed.org/)
+* Thanks [St.Louis Fred Reserve Bank](https://fred.stlouisfed.org/)
+* Thanks [eurostat Economic Indicators](https://ec.europa.eu/eurostat/cache/infographs/economy/desktop/index.html)