Update dependency env-cmd to v10

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
env-cmd	8.0.2 -> 10.1.0

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Release Notes

toddbluhm/env-cmd

v10.1.0

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• Feature: Added support for expanding vars using the -x flag.
  Note: only supports $var syntax
• Feature: Added support for --silent flag that ignores env-cmd errors and missing files and
  only terminates on caught signals
• Feature: Added a new --verbose flag that prints additional debugging info to console.info
• Upgrade: Upgraded dependency commander to 4.x
• Upgrade: Upgraded devDependencies sinon, nyc, and ts-standard
• Fix: Handle case where the termination signal is the termination code

v10.0.1

Compare Source

• Fix: Fixed bug introduced by strict equal checking for undefined when the value was null. This
  bug caused most executions of env-cmd to fail with an error, when in fact no error had occurred.

v10.0.0

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• BREAKING: Typescript now targets ES2017
• Fix: Default RC files will now properly be searched
• Change: Fixed some documentation issues
• Change: Use ts-standard instead of eslint for linting

v9.0.3

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• Fix: Use global flag on regex when parsing and preserving newline characters in env values (thanks to MaximTovstashev)

v9.0.2

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• Fix: CLI will now exit with non-zero error code when an error is encountered (thanks to blagh)

v9.0.1

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• BREAKING: Fixed major bug that required passing -- in order to pass flags to the command.
  Normally I release major breaking changes as major versions, but this was a bug and no documentation
  anywhere states using -- as intended or official behavior.
• Change: Fixed some documentation issues
• Change: npm run lint command now includes calling tsc to check for typescript errors

v9.0.0

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• BREAKING: Converted project to Typescript
• BREAKING: Changes to all option flags, see docs for new options
• BREAKING: Dropping support for node v4 and v6
• Change: Updated all dependencies
• Change: Update package-lock.json file
• Feature: Added support for asynchronous .env and .rc files
• Feature: Added support for a programmatic API
• Feature: Added --use-shell option (thanks to nidkil)
• Fix: Keep newline (\n) characters intact when parsing env files
• Change: Added node v10 and v12 to build automation
• Change: Updated Readme file to reflect new options and CLI changes

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