Simplify obtaining the binary

[Lobito]

Simple command for get the binary:

curl -L https://github.com/tj/node-prune/releases/download/v1.0.1/node-prune_1.0.1_`uname -s`_`uname -m` -o /usr/local/bin/
chmod +x /usr/local/bin/node-prune

• Avoid decompressing the binary
• uname -s and uname -m in the release URL

🙏

[TJ Holowaychuk]

yea hopefully soon this will be more easy in general. The whole Go community should be using one tool IMO, it has this great strength of cross-compiling but it's under-utilized ATM. Hopefully soonnnn