* chore(plugin-serverless): updates to @twilio/cli-core v7

Replaces `@oclif/command` and `@oclif/config` with `@oclif/core`
Updates `./bin/run` command and adds `./bin/dev` command
Sets engines property in package to Node 14 (matches `@oclif/core`)

Updates commands to call `await this.parse`
  - For commands that inherit from `TwilioClientCommand`, flags and args
    are already parsed into `this.flags` and `this.args` when
    `super.run()` is called. This removes the call to parse a second
    time and uses `this.flags` and `this.args` instead

* chore(plugin-serverless): adds package.json main property

Copied from: https://github.com/oclif/hello-world/blob/main/src/index.ts

Co-authored-by: Dominik Kundel <[email protected]>

* chore(plugin-assets): updates to @twilio/cli-core v7

Replaces @oclif/command and @oclif/config with @oclif/core
Updates ./bin/run command and adds ./bin/dev command
Sets engines property in package to Node 14 (matches @oclif/core)

* chore(plugin-serverless): updates to @twilio/cli-core v7

Replaces `@oclif/command` and `@oclif/config` with `@oclif/core`
Updates `./bin/run` command and adds `./bin/dev` command
Sets engines property in package to Node 14 (matches `@oclif/core`)

Updates commands to call `await this.parse`
  - For commands that inherit from `TwilioClientCommand`, flags and args
    are already parsed into `this.flags` and `this.args` when
    `super.run()` is called. This removes the call to parse a second
    time and uses `this.flags` and `this.args` instead

* fix(plugin-assets): make *.cmd files runnable

* chore(plugin-assets): adds package.json main property

Copied from: https://github.com/oclif/hello-world/blob/main/src/index.ts

Co-authored-by: Dominik Kundel <[email protected]>

 - [email protected]
 - @twilio-labs/[email protected]
 - @twilio-labs/[email protected]
 - @twilio/[email protected]
 - [email protected]