Add support for VSCode Exploration Builds

[zahidislm]

Specifications

• OS Version: Linux Ubuntu 18.10

• VSCode Version: 1.32.0 Insiders [Electron 4 Exploration Builds]

Expected Behavior

Extension activates on startup and using any of the extension commands is expected work as usual.

Actual Behavior

Extension fails to activate on startup and commands are not found upon using them.
Probably from not being able to identify exploration builds as valid Insider builds after v2.1.0

Steps to Reproduce

1. Install Insider exploration build from: Explore update to Electron 4 microsoft/vscode#61787
2. Install vscode-syncing from Marketplace
3. Attempt to use any command from extension (eg. syncing.uploadSettings)

Logs

[Extension Host] Activating extension 'nonoroazoro.syncing' failed: Cannot identify the VSCode version.. (at Object.showMessage (/usr/share/code-exploration/resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:735:197))

[Extension Host] Here is the error stack: Error: Cannot identify the VSCode version.
at new a (/home/zahidislm/.vscode-exploration/extensions/nonoroazoro.syncing-2.1.0/dist/extension.js:1:12958)
at Function.create (/home/zahidislm/.vscode-exploration/extensions/nonoroazoro.syncing-2.1.0/dist/extension.js:1:13392)
at new l (/home/zahidislm/.vscode-exploration/extensions/nonoroazoro.syncing-2.1.0/dist/extension.js:1:86657)
at Function.create (/home/zahidislm/.vscode-exploration/extensions/nonoroazoro.syncing-2.1.0/dist/extension.js:1:86785)
at /home/zahidislm/.vscode-exploration/extensions/nonoroazoro.syncing-2.1.0/dist/extension.js:7:17800
at t.activate (/home/zahidislm/.vscode-exploration/extensions/nonoroazoro.syncing-2.1.0/dist/extension.js:7:17948)
at Function.t._callActivateOptional (/usr/share/code-exploration/resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:740:963)
at Function.t._callActivate (/usr/share/code-exploration/resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:740:634)
at /usr/share/code-exploration/resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:739:810 (at /usr/share/code-exploration/resources/app/

Error: command 'syncing.uploadSettings' not found
at Proxy.t._tryExecuteCommand (commandService.ts:59)
at commandService.ts:52
at process._tickCallback (internal/process/next_tick.js:68)

[nonoroazoro]

@zahidislm Sorry for the late reply, I'll look into it.

[nonoroazoro]

@zahidislm I've finished the patch and will release after testing.

[nonoroazoro]

@zahidislm The new version is released which brings support for Exploration edition.