Update Dockerfile language server to 0.10.2

[rcjsuen]

First of all, apologies to everyone for having just disappeared into thin air and also thank you to everyone for your continued bug reports (even if I did not respond to them until now...) as it helps me identify things to fix to make everyone's Dockerfile editing experience a little better. I can't promise any turnaround times but I hope to be more responsive than I have been in the last year or so after seemingly dropping off the face of the earth. :P

---

This update adds heredoc support for COPY so that it does not try to format it or lint it for Dockerfile-specific errors. The update also includes a fix caused by quotes in comments that can cause the semantic highlighter to get into an infinite loop.

This should fix the following issues:

• HEREDOC parsing results in Empty Continuation Line output #3576
• Request textDocument/semanticTokens failed (on edge case) #3836
• Autoformatting breaks Dockerfile with heredoc (for COPY instruction) #3950

This does not fix #3576 (comment). I need to wrap my head around that one and I would suggest creating a separate issue about that.

The following file should trigger the above three problems so it can be verified on the current build. With the fix, you should:

1. not be spammed by the "Request textDocument/semanticTokens/full failed." error whenever you try to type anything in the file
2. formatting should indent /folder in the second COPY but ignore the first COPY
3. as noted in the file, line 11 should not get flagged by a false positive

FROM ubuntu 

RUN echo "hi there" &\
# Let's add a comment with a markdown link [here](https://www.google.com) hope nothing breaks...
echo "oops I broke something and I'm getting a lot of popup messages"

# there should not be an empty continuation line error on line 11
COPY <<EOF /bar/foo
a
b

c
EOF

COPY a b \
/folder/

[bwateratmsft]

Works great, thanks as always Remy!