Update documentation to mention RootTaskREPL.jl

Author: mkitti

README.md

@@ -12,6 +12,8 @@ Documentation is available at http://juliainterop.github.io/JavaCall.jl
 
 _JavaCall and its derivatives do not work correctly on Julia 1.1 and Julia 1.2. On Julia 1.3, please set the environment variable `JULIA_COPY_STACKS`. On 1.1 and 1.2, and on 1.3 without `JULIA_COPY_STACKS` set, you may see segfaults or incorrect results. This is typically due to stack corruption. The Julia long-term-support version of 1.0.x continues to work correctly as before._
 
+For Julia pre-1.5, consider the [RootTaskRepl.jl](https://github.com/mkitti/RootTaskREPL.jl) package. With RootTaskREPL.jl, JavaCall is able to execute fine without the need of `JULIA_COPY_STACKS=1` with the exception of `@async` calls. Starting with the Julia 1.5, the REPL backend now runs on the root Task by default.
+
 ## Windows Operating System
 
 Do not set the environmental variable `JULIA_COPY_STACKS`. To use `jcall` with `@async` start Julia in the following way:

doc/index.md

@@ -125,7 +125,7 @@ public class Julia {
 
 * Setting `JULIA_COPY_STACKS=yes` in startup.jl will not work. It must be set before Julia starts. On \*nix based systems, this can be done from the shell by using `$ JULIA_COPY_STACKS=yes julia` from a shell.
 
-* JavaCall can be used in a limited capacity from the root `Task` of Julia without `JULIA_COPY_STACKS=yes`. For example, using JavaCall in a programfile or via `julia --eval` will work. However, JavaCall will not function with `@async` or the standard REPL backend.
+* JavaCall can be used in a limited capacity from the root `Task` of Julia without `JULIA_COPY_STACKS=yes`. For example, using JavaCall in a programfile or via `julia --eval` will work. However, JavaCall will not function with `@async` or the standard REPL backend. For Julia pre-1.5, use (RootTaskREPL.jl)[https://github.com/mkitti/RootTaskREPL.jl] to execute the REPL backend on the root Task.
 
 * Alternatively, Julia 1.0.x works with all versions of Java.