This bug tracks the differences between current master Theia VS Code API and VS Code 1.99.
Based on analysis done in #15432

Public APIs:

• [vscode] TerminalState#shell property added #15433
• [vscode] API gap: Theia master vs. VS Code 1.98 #15137

Declarative APIs:

• none

Proposed API evolution (see #15432):

• [vscode] Support text encoding proposed API introduced in vscode 1.99 #15522

Application management:

• [vscode] bump API compatibility version to 1.99.X #15435