update init script

Author: cgroeschel

scripts/init.sh

@@ -6,7 +6,7 @@ echo "*** Initializing WASM build environment"
 
 rustup update stable
 rustup update nightly
-rustup toolchain install nightly-2020-12-12
-rustup target add wasm32-unknown-unknown --toolchain nightly-2020-12-12
-rustup default nightly-2020-12-12
-rustup override set nightly-2020-12-12
+rustup toolchain install nightly-2021-03-10
+rustup target add wasm32-unknown-unknown --toolchain nightly-2021-03-10
+rustup default nightly-2021-03-10
+rustup override set nightly-2021-03-10