Recompile task after runDeps to reload envs set by deps

[hori-ryota]

fix #1381

I would like to create an environment variable file using deps, read it with dotenv, and use it in cmds.

tested by followings

1. generate Taskfile.test.yml (copy from dotenv files are loaded before task dependencies are ready #1381 )

version: 3

tasks:
  make-env:
    cmds:
      - echo "MY_VAR=MY_VALUE" >> ./.env
  my-task:
    deps:
      - make-env
    dotenv:
      - ./.env
    cmds:
      - echo "MY_VAR = $MY_VAR"

2. run following

rm -f .env && go run ./cmd/task -t Taskfile.test.yml my-task

result:

(before):

task: [make-env] echo "MY_VAR=MY_VALUE" >> ./.env
task: [my-task] echo "MY_VAR = $MY_VAR"
MY_VAR =

(after):

task: [make-env] echo "MY_VAR=MY_VALUE" >> ./.env
task: [my-task] echo "MY_VAR = $MY_VAR"
MY_VAR = MY_VALUE

[hori-ryota]

@andreynering @pd93 If this approach doesn't seem optimal, I am considering setting up a custom system to reload dotenv and execute the tasks. I would appreciate your thoughts on whether this might be a viable direction.

[hori-ryota]

By the way, currently, dotenv: is checked before deps: and used in deps: executions, whereas env: seems to be used only in cmds: .

[hori-ryota]

@andreynering @pd93 What do you think about this pull request?