Don't let opam ask when not needed

Author: Cuihtlauac ALVARADO

Makefile

@@ -17,7 +17,7 @@ all:
 # results in a conflict
 .PHONY: install-test-deps
 install-test-deps:
-	opam install 'menhir>20211230' cinaps 'ppx_expect>=v0.15.0' \
+	opam install --yes 'menhir>20211230' cinaps 'ppx_expect>=v0.15.0' \
 		ocamlformat.$$(awk -F = '$$1 == "version" {print $$2}' .ocamlformat) ocamlformat-rpc
 
 .PHONY: dev

README.md

@@ -132,7 +132,7 @@ cd ocaml-lsp
 git submodule update --init --recursive
 
 # create local switch (or use global one)
-opam switch create . ocaml-base-compiler.4.14.0
+opam switch --yes create . ocaml-base-compiler.4.14.0
 
 # don't forget to set your environment to use the local switch
 eval $(opam env)