Make get_event async

Author: kdheepak

src/buffer.jl

@@ -24,7 +24,6 @@ function Buffer(rect::Rect, cell::Cell)
 end
 
 function Buffer(lines::Vector{String})
-
     height = length(lines)
     width = maximum(length(l) for l in lines)
     buffer = Buffer(

src/terminal.jl

@@ -31,7 +31,13 @@ struct Terminal
     end
 end
 
-get_event(t) = take!(t.stdin_channel)
+function get_event(t)
+    return if isready(t.stdin_channel)
+        take!(t.stdin_channel)
+    else
+        nothing
+    end
+end
 
 function update_channel(t, args...)
     for arg in args