Prepared release 0.7.8

Author: lefou

readme.md

@@ -161,9 +161,9 @@ To begin using OS-Lib, first add it as a dependency to your project's build:
 
 ```scala
 // SBT
-"com.lihaoyi" %% "os-lib" % "0.7.7"
+"com.lihaoyi" %% "os-lib" % "0.7.8"
 // Mill
-ivy"com.lihaoyi::os-lib:0.7.7"
+ivy"com.lihaoyi::os-lib:0.7.8"
 ```
 
 ## Cookbook
@@ -2093,6 +2093,10 @@ string, int or set representations of the `os.PermSet` via:
 
 ## Changelog
 
+### 0.7.8 - 2021-05-27
+
+- Restored binary compatibility in `os.copy` and `os.copy.into` to os-lib versions before 0.7.5
+
 ### 0.7.7 - 2021-05-14
 
 - Add support for Scala 3.0.0