[GNU ELPA] Eglot version 1.7

[ELPA update]

Version 1.7 of package Eglot has just been released in GNU ELPA.
You can now find it in M-x package-list RET.

Eglot describes itself as:
  Client for Language Server Protocol (LSP) servers

More at https://elpa.gnu.org/packages/eglot.html

Recent NEWS:

# 1.7 (upcoming)

##### Support hierarchical symbols in Imenu ([#303][github#303])

Thanks to Ingo Lohmar for the original implementation.

##### Handle multiple "documentation at point" sources ([#439][github#439], 
[#494][github#494], [#481][github#481], [#454][github#454])

Such sources include as LSP's signature, hover and also the Flymake
diagnostic messages.  They can all be presented in the echo area
(space permitting), or via `C-h .`.  For now, composition of different
sources can be customized using `eldoc-documentation-strategy`,
`eldoc-echo-area-use-multiline-p` and `eldoc-prefer-doc-buffer`.

The variables `eglot-put-doc-in-help-buffer` and
`eglot-auto-display-help-buffer` have been removed.

# 1.6 (16/04/2020)

##### Column offset calculation is now LSP-conform ([#361][github#361])

It seems the majority of servers now comply with the language server
specification when it comes to handling non-ASCII texts.  Therefore
the default values of `eglot-move-to-column-function` and
`eglot-current-column-function` have been changed.  The documentations
of these variables help to restore the old behavior.

##### Support workspace/configuration requests ([#326][github#326])

Also a new section "Per-project server configuration" in the README.md
should answer some faq's in this regard.

# 1.5 (20/10/2019)

Thanks a lot to Felicián Németh, Ingo Lohmar, and everyone else who
helped out!

##### Take over Company configuration ([#324][github#324])

Similar to what was already the case with Flymake, Eldoc and Xref, use
just the backend that can do something useful in Eglot,
`company-capf`.  See `eglot-stay-out-of` to opt out of this.

##### New option `eglot-autoshutdown` to disconnect after last buffer killed 
([#217][github#217], [#270][github#270])

##### Fix completion support ([#235][github#235], [#313][github#313], 
[#311][github#311], [#279][github#279])

Among other things, consider LSP's "filterText" cookies, which enables
a kind of poor-man's flex-matching for some backends.

##### Support LSP's "goto declaration/implementation/typeDefinition" 
([#302][github#302])

##### New option `eglot-send-changes-idle-time` ([#258][github#258])

##### Prevent Eldoc flicker when moving around ([#198][github#198])

##### Show large docs in help buffer instead of echo area by default 
([#198][github#198])

Also add two new customization variables
`eglot-put-doc-in-help-buffer` and `eglot-auto-display-help-buffer`.

##### Add built-in support for Go, Elixir and Ada ([#304][github#304], 
[#264][github#264], [#316][github#316])

# 1.4 (5/1/2019)

##### Correct param highlighting in the first line of signature

##### Display documentation strings with `gfm-view-mode`

##### Remove hard dependencies on `flymake-mode`

You can turn it off now in buffers managed by Eglot.

##### Run connection hooks with proper directory local variables 
([#196][github#196])

This fixes issues with suspiciously empty `didChangeConfiguration`
messages that are supposed to communicate parameters from a
directory-set `eglot-workspace-configuration`.

##### Fix completion sorting ([#190][github#190])

##### Take over Flymake and Eldoc completely while managing buffers

No longer try to add Eglot's facilities to existing facilities in
these two domains.

# 1.3 (10/12/2018)

##### Control strictness towards incoming LSP messages ([#144][github#144], 
[#156][github#156])

##### Add brief context after `xref-find-references` when available 
([#52][github#52])

##### Support `completionContext` to help servers like `ccls`.

##### Use Flymake from GNU ELPA ([#178][github#178])

# 1.2 (23/11/2018)

##### Support snippet completions ([#50][github#50])

Use `yasnippet.el` for this, if it is installed.

##### Implement `workspace/didChangeConfiguration` ([#29][github#29])

##### Handle experimental/unknown server methods gracefully ([#39][github#39])

##### Accept functions as entries in `eglot-server-programs` ([#63][github#63])

`CONTACT` in the `(MAJOR-MODE . CONTACT)` associat...
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