Support repeated values NAME=awsenv:/VALUE;NAME2=awsenv:/VALUE (#39)

* Allow support for multiple envvars pulling the same value
* Increase coverage
* Adjust to provide a default function to replace the environment

Support repeated values NAME=awsenv:/VALUE;NAME2=awsenv:/VALUE (#39)

* Allow support for multiple envvars pulling the same value
* Increase coverage
* Adjust to provide a default function to replace the environment

Merge pull request #34 from sendgrid/fix-golangci-lint

build: fix broken golangci-lint.sh location #patch

Merge pull request #33 from sendgrid/go1.18

Merge pull request #31 from sendgrid/ignore_sigchld

only pass in process abort/halt signals #patch

Merge pull request #30 from sendgrid/ignore_sigchld

Ignore SIGCHLD in signal handling loop #patch

Merge pull request #28 from sendgrid/debug_signal_handling

Explicitly catch and propagate signals to subcommands #minor

Merge pull request #24 from sendgrid/fix

fix lint warnings #patch

Merge pull request #22 from sendgrid/fatal-if-error

Fatally exit if startup errors out #patch

Merge pull request #21 from sendgrid/support-ecs

Support ECS #minor